Hi - this response may be a bit dated but I'll take a shot anyway.
I think it's a great idea to start out with equipment that you can continue to use as your diving interests and experience develop. Diving with the same gear as much as possible in different situations is also a lot more comfortable, and works better in emergencies. Technology does develop as well, though, so you can never be certain that what you buy today will not be replaced by something better in the future.
As things stand today, regulators, masks, fins, torches, cutting tools, SMBs are all incredibly flexible - you can use the same setup in virtually all situations outside of contaminated water - cold/warm, salt/fresh, technical/non-technical. An environmentally sealed regulator is worth a few extra dollars in case you ever decide to dive in cold water.
With regard to buoyancy control, backplate and wings are an incredibly flexible solution. Backplates are interchangeble (primarily aluminum vs steel), wings are interchangeable, and you can add or remove D-rings etc to/from your harness as needed. My personal experience is that a tiny wing is a real speciality item - 30-45 pounds offer a lot more options. Hence, if you want to have flexibility, then get a mid-sized wing rather than a tiny one. Also, if you want flexibility, avoid jacket-style BCDs. I would also suggest starting out with an aluminum backplate, as this allows you to put on a little bit more (about 4lbs more) ditchable weight - you should be able to quickly ditch enough weight in any situation to swim up from 20-30 feet, and with a steel backplate there is less to quickly ditch.
With regard to tanks, there are tons of options out there, and the best choice really depends on what kind of dive you are planning to do on a given day. This is not an area where one size (perfectly) fits all situations. Short and shallow dives require a lot less gas than deeper and longer dives. Higher risk dives (solo, deep, low viz, cold etc.) require more redundancy than lower risk dives. My personal choice is actually a double 7 liter for recreational dives, and double 12 liter or 15 liter for technical dives, plus stages. I dive a lot in cold water, so having two first stages is pretty much a necessity. I also like the fact that the double 7 is very balanced, and that emergency actions are the same as if I'm diving double 12s or 15s. In addition, they provide redundancy for any intentional or unintentional solo diving. The downside is that I need to bring a single tank adaptor when travelling, to be able to use single 12 or 15 liter rental tanks. Not a biggie.
With regard to exposure suits I agree with you that a drysuit is the most flexible option. A drysuit can be used in virtually all environmental situations and for any type of dive. Wet suits, on the other hand, are really only good for recreational dives to about 15 degrees celcius, or short technical dives in very warm water. However, drysuits have a number of downsides that may make it worth investing in a more specialized wetsuit setup. Drysuits are expensive, require a bit more maintenance, can be cumbersome to put on and take off, and are really, really hot in hot weather. Putting on a drysuit in anything over 20 degrees celcius can be a bit like sitting in sauna for a while - you start sweating in the suit after a few minutes. So, even though a drysuit is an incredibly flexible solution, getting a wetsuit may be worth it after all. 5mm neoprene works for a lot of situations - as far as I can tell this is what you have now ended up with on your list as well.
One important point about drysuits is that if you want a redundant system, you cannot add up drysuit buoyancy and wing buoyancy to get a total level of buoyancy. Instead, you should think of wings and drysuit as providing redundant lift. If your wing has a problem, you can use the drysuit, and if the drysuit floods, then you can put extra air in the wing. This only works, though, if your wing has enough lift to compensate for a flooded or fully squeezed drysuit - again suggesting a mid-sized as opposed to a small wing. I think this point has been brought up by others on the thread as well.
With regard to solo diving, I would recommend taking a course as soon as possible, so that you don't end up doing it without training. You will find that having a redundant air source (doubles or pony) is one of several requirements for solo.
---------- Post Merged at 02:59 PM ---------- Previous Post was at 02:59 PM ----------
Hi - this response may be a bit dated but I'll take a shot anyway.
I think it's a great idea to start out with equipment that you can continue to use as your diving interests and experience develop. Diving with the same gear as much as possible in different situations is also a lot more comfortable, and works better in emergencies. Technology does develop as well, though, so you can never be certain that what you buy today will not be replaced by something better in the future.
As things stand today, regulators, masks, fins, torches, cutting tools, SMBs are all incredibly flexible - you can use the same setup in virtually all situations outside of contaminated water - cold/warm, salt/fresh, technical/non-technical. An environmentally sealed regulator is worth a few extra dollars in case you ever decide to dive in cold water.
With regard to buoyancy control, backplate and wings are an incredibly flexible solution. Backplates are interchangeble (primarily aluminum vs steel), wings are interchangeable, and you can add or remove D-rings etc to/from your harness as needed. My personal experience is that a tiny wing is a real speciality item - 30-45 pounds offer a lot more options. Hence, if you want to have flexibility, then get a mid-sized wing rather than a tiny one. Also, if you want flexibility, avoid jacket-style BCDs. I would also suggest starting out with an aluminum backplate, as this allows you to put on a little bit more (about 4lbs more) ditchable weight - you should be able to quickly ditch enough weight in any situation to swim up from 20-30 feet, and with a steel backplate there is less to quickly ditch.
With regard to tanks, there are tons of options out there, and the best choice really depends on what kind of dive you are planning to do on a given day. This is not an area where one size (perfectly) fits all situations. Short and shallow dives require a lot less gas than deeper and longer dives. Higher risk dives (solo, deep, low viz, cold etc.) require more redundancy than lower risk dives. My personal choice is actually a double 7 liter for recreational dives, and double 12 liter or 15 liter for technical dives, plus stages. I dive a lot in cold water, so having two first stages is pretty much a necessity. I also like the fact that the double 7 is very balanced, and that emergency actions are the same as if I'm diving double 12s or 15s. In addition, they provide redundancy for any intentional or unintentional solo diving. The downside is that I need to bring a single tank adaptor when travelling, to be able to use single 12 or 15 liter rental tanks. Not a biggie.
With regard to exposure suits I agree with you that a drysuit is the most flexible option. A drysuit can be used in virtually all environmental situations and for any type of dive. Wet suits, on the other hand, are really only good for recreational dives to about 15 degrees celcius, or short technical dives in very warm water. However, drysuits have a number of downsides that may make it worth investing in a more specialized wetsuit setup. Drysuits are expensive, require a bit more maintenance, can be cumbersome to put on and take off, and are really, really hot in hot weather. Putting on a drysuit in anything over 20 degrees celcius can be a bit like sitting in sauna for a while - you start sweating in the suit after a few minutes. So, even though a drysuit is an incredibly flexible solution, getting a wetsuit may be worth it after all. 5mm neoprene works for a lot of situations - as far as I can tell this is what you have now ended up with on your list as well.
One important point about drysuits is that if you want a redundant system, you cannot add up drysuit buoyancy and wing buoyancy to get a total level of buoyancy. Instead, you should think of wings and drysuit as providing redundant lift. If your wing has a problem, you can use the drysuit, and if the drysuit floods, then you can put extra air in the wing. This only works, though, if your wing has enough lift to compensate for a flooded or fully squeezed drysuit - again suggesting a mid-sized as opposed to a small wing. I think this point has been brought up by others on the thread as well.
With regard to solo diving, I would recommend taking a course as soon as possible, so that you don't end up doing it without training. You will find that having a redundant air source (doubles or pony) is one of several requirements for solo.