For what its worth, you should also be checking out the newer mirrorless cameras from Sony, Olympus, and Panasonic. I think mirrorless is the future of camera technology, and you can also get some mirrorless "pro-sumer" grade cameras that will more than suffice for the average photographer. Plus with interchangeable lenses, and a myriad of adapters, you can utilize lots of different glass. I believe someone mentioned it before, but camera bodies keep changing and technology keeps advancing, but good glass is good glass, and it always will be.
For instance, I use a Panasonic Lumix GF3 m4/3 body with an adapter to a vintage Minolta MD 50mm macro lens for most of my coral photography. $300 for the body little over a year ago, and $50 for the vintage lens, and it works like a charm, so long as you are comfortable in manual mode on your camera. There are so many great vintage lenses out there from the 35mm cameras of the 60s and 70s, and they produce some amazing results for a fraction of the price when adapted to mirrorless bodies.
Check out some of the mirrorless, nex, and micro 4/3 forums out there. Some interesting stuff. And if you think us reefers are hardcore in our hobby, wait til you see some of them! My $.02, for what it's worth