DSLR's for Astro Use

I am thinking of buying some Cameras for general and astro use, with the
possibility I can offer them to astronomers too..

Which ones do people think are the best for the job, both astronomy & as a
general camera? 10DA springs to mind?

Are any of these any good to offer to astro-photographers??

The prices would be good too.

Let me know your thoughts on them

Sony A200 DSLR
Sony Alpha A350 SLR
Nikon D60 SLR
NikonD80
NikonD300
Sony Alpha 700 SLR
Olympus SP570UZ DSLR
Samsung DSLR Cameras
Nikon D40 18-55mm DSLR Kit
Canon EOS 450D Digital SLR

Thanks for your help and input

Andy

Mr Andrew R Green BSc(Hons) FBIS, FRAS
Fellow British Interplanetary Society
Fellow Royal Astronomical Society
Director & Lecturer, StarDome - Astronomy & Astronautics
Director Anglo-Australian Astro Education Partnership