Wow... I am sooo glad this text is auto-saved or that accidental ctrl-w instead of shift-w would have ruined my morning!
First, thank you all for your responses. I'm really glad I ended up posting on here for advice. It's been fascinating hearing your discussion on nuances to the gear I may not have otherwise considered in time... after all, you don't really know what you don't know until you know you don't know it, right? Ha! That said, I now have even more follow-up comments/questions...
The BP/W option had been mentioned by the second dive shop as a more advanced option for when I was getting into multiple tanks / technical... I probably did myself a disservice by getting too quickly fixated on the back inflate travel bcd. From the sounds of it, such a bp/w setup could be disassembled so I'd be able to travel with just the wing and a lighter weight / plate to warmer climes, yes? Would it also be safe to assume that the wing can be packed into a relatively small size? After all, it was a well noted comment that there isn't the best or most scenic diving around Toronto... but that being said, and this being where I live, I think it prudent that I hone my skills while I can here before I go to see places that are more exciting! In my OW dives, I was... well, awful with buoyancy too - some of the problems I had struggled with coming clear when reading more about bp/w's - so that in particular is an issue I want to address. And I'll admit, the engineer in me quite enjoyed the (literal) free body diagrams of the divers' weight distribution under different bcds. Given all this, I think you may all have good points about moving to a bp/w... at the very least, it would give me one less thing to have to think about while trying to get my buoyancy down! Er... neutral.
The pocket thing wasn't really an issue on my mind, and doesn't sound like something that I'll have trouble addressing if it ever becomes one... and the weight isn't a huge issue either, since I am a pretty big guy myself.
The other big question I'd have with the bp/w bcds is just with respect to dumping the air... I know when we were training with the jacket style in the pools, they were a pain to get empty because you'd have to roll awkwardly to get the hose / shoulder to be the highest part of the jacket. The back style seemed very similar, though (and this may be an incorrect assumption on my part) I assumed the bungees on the knighthawk would have helped somewhat by compressing the bladder. Is this a common issue with all bcds, or something I can figure out a macgyver'd solution to, or something that I just need to learn to deal with?
Lastly on the subject of bcds... even though the I3 isn't a model I'm considering at this point, I must ask (because I'm curious)... if the inflation/deflation is controlled by that lever on your side, how do you do a manual inflate if you run out of air? I mean, I can picture it if you've added (as some said people do) an air2 to it, but in its basic form? Is that just a rare-enough situation that they decided it isn't an issue?
On the subject of regs, the reason I got it into my head that these should be one of my early purchases was because of several less-than-pleasant experiences I had with the regs they gave us in our pool - and even OW - dives... from awful breathability to free flows to just not having clips to attach the octo to me... and a conversation I had with one of my coworkers who is a very experienced diver (I'm almost willing to bet he started diving before I was born!) where he mentioned an experience he had with a set of rental regs going on him and nearly dying as a result. Since these largely determine how comfortable I am at depth and my life really depends on them, they weren't something I wanted to cheap out on. Hence my slow migration from the basic kit offered by the shop I trained at to the mares suggested by the second to the apeks being pushed by the third. I want good quality here, but because I am new and I want something versatile that can be fixed by any dive shop I may wander into (if it were to fail while on vacation, for instance) I was looking at mainstream name brands. Post #4, it was suggested I look at a HOG D1. The price sounds right (especially considering some poorly-timed and unfortunately expensive repairs that I now need to have made to my car... ugh...) and it sounds like I could potentially learn to do some repairs to them myself (which could help with the vacation failures, I suppose) but... how widely known is this brand? This could just be my inexperience as well, but I hadn't encountered that name before. Am I going to have trouble getting them serviced locally - wherever that local may be? The other question is just how well do they perform in cold weather? While personally I think Toronto is still "warm", the last thing I'd want is for my reg to freeze up on me. The guy pitching the apeks said he had used them on dives in the arctic without problems, that they had better breathability than the aqua lungs... basically, two things that gave me more comfort on their suitability. It also didn't hurt that he was selling them with a "parts for life" offer. Who is edge / HOG... how comfortable can I be in their reliability / availability / maintainability / safety?
Regarding the first stage, I don't think any of the dive shops I went to were very clear on what they were including in the package. I suppose I just assumed it was bundled with the second stage. Again this goes to show how I can do all the research I want but if I'm not asking the right questions I won't get the right answers!
With the console, when I said "downgrade" I meant price not practicality - though I did quite enjoy the nickname 'crab-basher' and can see a 3 gauge coming in handy if I should get hungry...
But no, I would definitely prefer just the SPG with a wrist computer and compass setup. It just seems cleaner and more accessible that way.
Lastly, the wet / dry suit. To be honest, before I started the course I was thinking that it would be my very first purchase. It was only when I had to deal with crappy regs and an unpleasant jacket bcd that I started thinking of refocusing on that gear instead. Maybe the best route is to just go all out and get *all* the gear right off the bat. I'll have to start looking into the nuances here before I can come back with yet more questions for you all though!