I'm finally going to get a dslr, and want one for underwater use as well as dry land.

So far the Canon 40D 10.1MP has the edge in quality, price point for an advanced amateur, and history behind it for underwater use. Lots of info on the web.

The newer 50D doesn't seem to be better, just 15MP.

And yes, I'm leaning toward Canon at this time.

I would pop for the Canon 5D 12.8MP if someone made a good case for it over the 40D. Is the full frame size really that important in underwater image quality?

Thanks in advance, and Nikon devotees, I'm open for convincing on your set-up.

Likely going with the Ikelite housing to start out with.

Oh, please advise on lenses also. I see where the 60mm is popular. My major area of interest will likely be macro.

I hope that someday we can put aside our fears and prejudices and just laugh at people.