I am an Underwater Photographer for 6 years now and I switched to digital about 4 years ago. I owned 3 different consumer digital cameras and the current one is an Olympus C-770uz in an Olympus PT-022 housing. I also have an Inon D-2000 s-TTL strobe and an Inon UWL-100 wideangle lens.
I would like to upgrade to a DSLR. Could anyone advise me what the best choice is? I would like to keep using my current strobe. And the SLR must be limited in price. I'm thinking of a Nikon D-50 or D-70s, EOS 350D or Olympys E-330/E-500.
Any suggestions are welcome...and thankx in advance...
I highly recommend Nikon D50 (with Sea&Sea housing DX-D50)
the Auto focus speed is very fast ( i can't tell the different between my Nikon D2X and my Nikon D50)
and the ability to focus under low light condition is execent!
Pricewise i think the price of DX-D50 housing is very acceptable...
and i think the build quality for this housing is very good
i have no complains for this housing + (it's very compact)
I only use my Nikon D2X for top-side shooting. I was planning to buy sea-cam housing.
However, after i found out the price of the sea-cam housing, my breath almost stop instantly hahahha 
so i decided to buy a housing for my Nikon D50 instead 
here are 2 pics that i took at Anilao last august using
D50+DX-D50 + YS-90 auto 2 units + sigma 105mm macro lens


these 2 pics are stright out from the camera.
Only some minor touch-up to remove the sand + resized it.
Have fun in choosing the housing
Andree
Lampung, Indonesia