I dive a Suunto Vyper Air, bought the transmitter last year so I have the air info in it too. It has all the necessary data for logging (that a computer can have, e.g not your weighting and vis!), does nitrox and has a gauge mode (so it becomes bottom timer and doesn't to any of the calculations for me). Most the people I dive with use a Suunto Gekko, similar feature list but no air integration. Do bear in mind what buddies dive with as it can be quite useful diving off the same decompression model so your safety stops etc. tend to match up.
---------- Post added September 2nd, 2014 at 07:58 AM ----------
Oh and I forgot to say, the cable to download to your computer is an extra cost, but I got a third party one a couple if years ago for about £15.
---------- Post added September 2nd, 2014 at 12:31 PM ----------
p.p.s the Suunto Zoop has replaced the Gekko