I've wanted to scuba since I was a little kid and was infatuated with the ocean as far back as I can remember. I started keeping saltwater reef tanks about 8 years ago and have a gained a real passion for corals and reefs in general. So at this point in time I want to focus on diving natural reef environments, to get a glimpse at what I've been trying to recreate in my little glass box. As far as I'm aware The Keys are the only place in the continental U.S. that I can witness this habitat. and luckily only a 6-8 hour drive.
Do some more research. There are plenty of great reef environments much closer to you. In fact pretty much everywhere in between Jupiter and Miami has great, well some better than others, diving. Jupiter probably being the best of all.
The diving in Jupiter is particularly great for reefs, turtles, sharks and all other marine life. You would be able to do weekends, or even day trips to Jupiter and get really incredible dives.
Yoke are more common with rental tanks, although many outfits will have both Yoke and Din. Tech divers prefer DIN as they can handle higher tank pressures, and provide a more streamlined attachment to the tank, among other benefits. Especially in Jupiter, the main shop rents both DIN and Yoke, so you won't have a problem there...
FYI, I dive the MK25/S600 setup and I've tried dozens of regs. There are plenty of exceptional regs out there by Apeks, Hog and others, but from my own test dives, the mk25s600 is hands down my favorite. Breaths smooth and easily from the surface down to 200 (haven't been deeper), inverted and even if I'm really working, the change in air delivery is almost non-existent.
I would advocate trying a few different regs, but ultimately buy them sooner rather than later. While rental regs are fine, I've had past bad experiences with them breathing "wet" or difficult, since they see a lot of use, and not all shops maintain them as well as they should... That's not to say they're all bad, but for my life support, I'd rather know exactly where it's been and how it's been treated.
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