You're not giving us much to go on. ALL manufactures have a wrist mount that fits your needs based on the limited information provided. Most of the wrist mount units are made by the same few companies and are private labeled.
I suggest you go to a LDS with your mask. Put your mask on and try the computers on. See how well you can view the display with your mask on in daylight and dark (with back lighting on). After you find the ones that are comfortable wearing and viewing, you can take into account the features you want, past AI. Then make a choice based on what you can afford.
Here are some suggestions that are larger than the 'watch sized' units.
Oceanic VT4.1 / Suunto Vyper AI
If I were going to choose a new computer, AI would last on my list of features I would be looking at.
Things I would consider:
1. Can I see the display easily in day/night/low visibility and does color make a difference. (kind of important..
)
2. Does the computer meet my diving needs (Air/Nitrox/Tri-Mix/gas switching during dives)
3. How does the algorithm deal with multiple dives and deco requirements (the conservative debate) and are safety stops programable including deep stops.
4. How much user flexibility do I have with the algorithm(s)
5. How easy is it to use and run through the menus and program before the dive as well as during the dive
6. Does it have a dive planner built in and is it quick and easy to use
7. How does it fix on my arm or wrist
8. How easy is it to change the battery and what type. Recharging issues and time.
9. Manufactures warranty
10. Cost and ease of upgrades
11. User review of know issues and fixes
12. How easy does it download the data to the computer and what 3rd party programs easily accept the data
13. Cost
14. AND LAST does it have AI and how well does it work
IMHO, AI is nice, but not necessary. I have this feature on my OC1 and use it as a back up to my SPG. I find the reading to be about 150-200 psi lower than my SPG reading (my guess is the lawyers made them do this). The only features of the AI that I really find useful is the estimated air time left, the fact that I get a quick snapshot of air data when I look at my computer and there is an alarm that is user set to a PSI remaining.
And lastly look to buy used. You will usually save 1/2 or get twice the computer for your budget.