I have a good number of manual focus Canon (A-1, AE-1, AE-1P, EF and Canonflex) but no EOS so I can't speak for the case of Canon. Actually I found the Canonflex has the most charm and I likely to use it most. I have both Minolta AF and MF. Among the AF are the 9xi, 800si and 7. I might use the 7 but would care for either of the other 2 although they were the top of the line. Now I would use the XD-11 often and sometimes the SRT-101 as they are fun. None of the AF cameras can fetch any where near the Minolta XK with the 58mm f/1.2 MC that I also have.