Just to mix things up a little - the Blue Hole is
cold water so your shorty might not be enough if you plan to go there frequently.
What doesn’t change is the temperature—a constant 62 degrees
It's also 4600' which qualifies as an elevation dive. Some (maybe all?) computers can compensate for it.
If you are going to buy that BC with the AIR2 you'll always have to plan on having the dive shop swap your inflator - they're not going to want to let you do it since
if you accidentally crossthread their reg it makes it useless and something you'll pay for. Plus since it's their reg, they'll likely want to test it before allowing you to use it - they're the ones with the big insurance liability.
Additionally they'll do that on their tech's schedule - not yours. Some may even charge you for it. We often fly to carib/central america dive destinations from here and plan to dive the morning dives the next morning - that may not be possible if you have to ask them to change it.
Also if you're not diving with them every day - they may want to let you keep/charge you the daily rental since you're now tieing up a reg they can't use while it has your Air2 adapter on it. Otoh if they have a lot of extra reg sets - maybe not. Hopefully they don't grab "yours" and give it to someone else in the rush to get everyone on the boat.
Since you seem to plan to travel a lot, I'd go for a regular BC with a standard inflator - either rent first or buy it and get your own regs. The way I look at it since I don't have to put the BC in my mouth - a regulator would be my first buy if I had to stagger them. People are taught (correctly) to vomit thru their regulator if necessary - you'd like to hope those get thoroughly cleaned/disinfected b4 you get it.
Then any AIR2/SS1 or other odd setup you come across can be accommodated also if you wish. I could be wrong but I believe there's no standardization in octo/inflator fittings so each mfr. has their own.
If you are looking at an Air2 - that's considered a Scubapro regulator so find a dealer in ABO that sevices them. Mght make sense to buy Scubapro regs also in that case so they can do it all. It appears you have two - Deep Blue or New Mexico Scuba Center.
http://www.scubapro.com/en-US/USA/dealer-locator.aspx
90% of rental BC's are inexpensive jacket models optimized for rental purposes - more robust construction, very standardized configuration so parts can be swapped as needed - one mfr' even prints the size/serial # on the shoulder for inventory purposes. My point is most times, there's a standard 2 button inflator running down the left side so for me owning my own be a lesser concern initially..
Except sometimes they're junk or leak. Although once my buddy commented that a rental at an upscale resort on Roatan was a nicer Scubapro model than he owned. They looked almost new also.