I'm a rookie, too, since I just bought a camera today -- what better time to join this forum? This is my first post.
I'm only a recreational diver, too, and my only previous UW photography where I rented a 35 mm Sea and Sea camera once. But I've been researching for a good while, and bought the SeaLife DC500, a 5 Mp point 'n' shoot with its own lexan case for about $650 street (including a flash bracket and a large external slave strobe).
I have several diver acquaintances who own the earlier, 3-Mp model, and they all rave about it. I don't think its inability to operate under manual control -- or shutter-preferred or aperture-preferred -- is a show-stopper. I know when I dive, all I want to do is get the right distance, compose, and shoot, with my frined Mr. Photoshop to help me if my color balance or exposure is off. And the price sure is right!
I'm going to Baja California in a couple of weeks, and Cozumel in November; I should have a good chance to figure out if I made the right choice!
Does anyone here have that particular camera?