Gary,
Depends largely on your budget. I do'nt know the seller, but this EM200 would be excellent... +/- 5 arc seconds... MMMm nice for astro photography. [edit: damn, Dennis beat me to it...]
http://www.iceinspace.com.au/forum/s...449#post135449
Only down side is I don't think you can link the EM200 to a computer for GOTO etc. Also not sure what that means for auto guiding?
Other than that..I chose the Losmandy GM-8.. see my comments here:
http://www.rogergroom.com/rogergroom...arentNodeId=57
Roger.