I've had the Canon Elan 7 body for years and have three Canon EF USM lenses. I need to make the switch to a DSLR body and; in an effort to save money, have decided to keep my lenses and get a compatible Canon DSLR body. A local camera shop told me that my EF USM lenses wouldn't work on any of the Digital Rebels...I would have to start with the 40D and go up from there. Any truth to that? I checked out the Canon website and their Digital Rebel cameras said they took both EF and EF-S lenses. HELP!!! What is my starting point?