aj boet, loose the testosterone. Certified 1 year, a fish, and a technical diver!!!??? The point is not the cost but the inconvenience. Depending on where you are in the world the thing has to be sent away for a variable period of time, to get a battery change, a sure way to ruin a trip. I carry a spare battery and o-ring in my save a dive kit. Personally, I use a Cobra 3 because I like everything in one place, and don't trust the tank pressure transmitter, yet another non-user replaceable battery to fail at and inconvenient time.
Generally I agree with the previous posts, if you want a watch, buy a watch, if you want a dive computer buy a dive computer. Generally bigger displays are better. In terms of Trimix, that is a whole different ballgame and in that world I'm sure there are better computers (VRX, Liquivision etc), more suited to the task. I think Trimix is way out of the recreational diving scene, the cost, of fills, equipment and the need to train and maintain skills, and the inherant risk makes me think there has to be a extremely compelling reason to be that deep in the first place, and other than semi-professionally or professionally mapping new caves or discovering new wrecks, I find it hard to justify. Oh, and setting world records!!
Each to his own, I suggest make a list of what is important in a computer, to you and your style of diving, and then see which one fits the bill most closely.
Stadig oor die klippe.