How about a Pentax *ist DS. I have one, with a 2 times teleconveter, and a 50-500 sigma zoom lens. Together with a 1 gig memory card makes for a very versatile mix. A must is a bulb.
I will shortly be getting a 90mm solar filter to put on the front of the lens so that no matter what I can get a solar shot of the sun at any time.
The lightness of the camera makes for a better setup and less stress on the scope and lenses.
Other toys to get are a scopetronix's maxview digital slr fitting and a t adaptor. You can fit easily a nagler 31mm eyepiece or anything elseyou wish for projection. Not that I have a nagler (know enyone that wishes to donate to an obsession!).