I'm a total noob, I have been using a Canon A540 and A610 and would like to move up to a SLR. I have been looking at the:
Canon XT, XTi, 10D
Nikon D40, D40x, D80.
Most of the pictures I take are of my work, so alot of interior house stuff. I would also like to be able to go to the CMRA races and snap some far shots also. Help me out here guys/girls. Do I really need 10MP? Is buying used a smart idea? What are the must have accessories to go with it.