depends what type of tec dives you are doing.
For deep work, you need a top of the line diagfram reg.
Opinions differ which is the best, but at the end of the day, they are opinions.
I have used and owned the Mares abyss, the Micra, the Titan, Dive Rite etc etc, (not the apex yet) all are a little different.
The mares is a bit heavy and the MR16 has the same internal geometry as the MR22, just less metal, but it breathes at 60 m like it breathes at 60 ft, mares for years were a little special because the HP seats were less reliable than the US Divers/AquaLung.
The Micra, great reg but the 2nd stage is a ***** to open without a special tool. If it has a problem it is virtually impossible to fix in the field.
The Titan, has a similar first stage as the Micra, but the 2nd stage has a soft cover that can be opened without tools (even underwater if you look at what the DIR guys say).
For cave diving, I used to use Scuba Pro for no particular reason otherthan I got a bargain on them at the time and they were a good diafragm reg. I have since changed to the Sherwood Brut as it has less moving parts than just about any reg on the market and that means less potential points of failure. Anyone that has seen this reg in rental situations knows that it works for ever, you can run it over with a truck and it will still breathe as good as the micra (except v. deep). The caves here are shallow, so I dont need performance, I need reliability.
Hope that helps out a fellow kiwi a little m8.
