The Oceanic, Aeris, Genesis, Sherwood and Dacor hoseless air integrated models are made by the same company and have the same internals. (US Divers also carried their version but don't any longer). That leaves only two units to choose from. I've used both and like both. The blackout will happen, but it is only a transmission blackout, meaning the only thing you may not see for a few seconds is tank pressure and air time remaining. Deco functions and everything else the computer is supposed to do is intact. The blackout happens supposedly when you use high powered camera strobes, dpv's or when your arm is out of it's 4-6ft range. It re-aquires the signal quickly and doesn't miss out on any information.
The Uwatec model is newer and has the capability to be used as a semi closed rebreather computer as well. The Oceanic Data Trans Plus is the easier to read with it's color coded and easy to understand graphs and symbols. The Oceanic has user repaceable batteries where the Uwatec has a battery replacement program. You won't go wrong either model.
The high end models are:
Uwatec Aladin Air Z o2
and the
Oceanic Data Trans Plus
both are programmable air integrated hoseless nitrox computers
For added peace of mind, pick up a $50 analog pressure gauge, attach it to the other hp port on your first stage, tether it to a good spot on your right hand side and you've got a modern, bulletproof system that has redundancy built into it. It's a winner!