Hi Brad,
Welcome to the wonderful (and crazy
) world of astrophotography.
Personally I like CANON DSLRs the best. However, neither me nor this forum can be the best resources to inform you appropriately on this and many other topics of practical astrophotography.
I suggest you to take a look at some excellent specialized websites, mailing lists and online forums. As a beginning, visit CloudyNights:
http://cloudynights.com/ubbthreads/ubbthreads.php?Cat=and the Digital Astro Yahoo group:
http://groups.yahoo.com/group/digital_astro/On these sites you'll find a crowd of great people that will be glad to help you start you astro-imaging career.
Thank you for writing, and good luck.
Regards,