Well, an AI Computer is much more expensive than a normal wrist computer. Also out of my budget.
It will only tell you how many psi you have in your tank following your dive profile. Nice information, but needed ?
What does a dive computer tell you ?
Two things : depth & time and with those two things where you are in the tables.
If you calculate your Preasure Group by hand in the planning phase and after the dive, you will consider only the max depth (rounded up) and time (again rounded up) from the moment you went down to the moment you came up. You are going up when you or your dive buddy run out of air or you and your dive buddy are near the NDL.
In this last case is where the Dive Computer is a distinctive gadget. If you have still air you can go on diving as the dive profile will follow what you actually did and not the max depth.
Add alarms, security stop, nice colours and PC interfase, and you are. Less 500 bucks.