Requirements:

Wrist computer rather than console.

Air & NITROX

Biggest display with biggest numbers possible

Most interested in seeing (only) depth, bottom time remaining and huge ascent rate display - Audible alarm would be nice too if it is seriously loud. I have severe tinnitis so this may not be possible. (I can't hear the Minature Ascent Rate Alarm - MARA.)

Would rather not have display of nitrogen loading graphic, O2 saturation graphic or any other crap on the main display.

Do not want air integration.