Suunto Vyper is an OK nitrox computer, the only I have used, but the backlight is on not more than 30 sec at a time. I guess many dive computers may share this "feature". Re-enabling the backlight on Vyper requires "just" a press of a large button, but doing that every 30 sec while controlling your ascent sucks. With the default screen protector (can be removed) and while wearing dry gloves the experience is really frustrating. I hate it. If something unexpected happens in complete darkness, you have two problems to solve: 1) the actual problem and 2) enabling the backlight or pointing the dive light. Yes, you guessed it. 1+2=3.
For daylight/dusk dives I like the Vyper (the screen is decently readable in low light without backlighting), but when in complete darkness, I just hate each second. Pointing the dive light towards the computer just to check depth and ascent/descent rate is annoying.
I would want an OLED machine (like OSTC) instead. They are, however, three times the price of a Vyper.
As a cave diver you have plenty of light so no problem there. Just some annoying moments during long slow ascents...
Vyper also records the water temperature, but only at the beginning, max depth and end. No air integration. Vyper2 has constant temperature logging.