halocline
Contributor
Really most regs made by reliable companies are more than adequate for recreational diving; I've done many dives on the "lowly" MK2/R190 and it performs very well; not quite as smooth as my MK15/G250, but completely acceptable. And the truth is that the simpler the reg design, the more reliable it is, although any decent quality reg these days will be very reliable if it's maintained. The balanced first stage is not the big deal that many make it out to be; on my MK2 there is a SLIGHT increase in breathing resistance as the tank nears empty, like 300PSI, and by that time, if you're not heading for the surface, you might need the reminder that air is getting low. Depth affects balanced and unbalanced first stages exactly the same way, contrary to what you might hear at the LDS bent on selling you the top model. OTOH, so many first stages are balanced that it's almost a non-issue in today's market.
I'd be cautious about trying to save ounces; once you're in the water the weight makes no difference, and in general larger 2nd stages have a slight performance advantage to smaller ones, all else being equal. Plus, unless you're the kind of person that cuts the handle off on your toothbrush to save an ounce or so (an old mountain climbers' trick) you'll never notice the difference in weight in your gear bag.
An overlooked but very important consideration IMO is the availability of parts and service in the areas you'll be diving; this tips the scale in favor of the larger companies that sell regs all over the world; SP, aqualung, mares. Atomic regs, for example, have a great reputation, but are made and sold primarily in the U.S. if I'm not mistaken, so you might get stuck someplace remote if you need a replacement part while on vacation.
I'd be cautious about trying to save ounces; once you're in the water the weight makes no difference, and in general larger 2nd stages have a slight performance advantage to smaller ones, all else being equal. Plus, unless you're the kind of person that cuts the handle off on your toothbrush to save an ounce or so (an old mountain climbers' trick) you'll never notice the difference in weight in your gear bag.
An overlooked but very important consideration IMO is the availability of parts and service in the areas you'll be diving; this tips the scale in favor of the larger companies that sell regs all over the world; SP, aqualung, mares. Atomic regs, for example, have a great reputation, but are made and sold primarily in the U.S. if I'm not mistaken, so you might get stuck someplace remote if you need a replacement part while on vacation.