Alastair said:You don't say what your present lenses are, so assuming they are a mixture of EF and EF-S lenses any body in the Canon ###D or ##D ranges would accept them.
The natural progression is usually towards better lenses first, and a better body later.
To be honest it's image quality I'm not too happy with especially my sigma lens shots, I appreciate it's not just a case of point and shoot to get great photos but I do wonder if a better lens/camera might help