I just sold my olympus digital slr and I want to get a used Canon. I can't afford a fancy new dslr at the moment so I want to focus on building a kit of lenses and accessories until I can get a good one later in the year. I've looked at the 20D, xti and the xs because I can get any of them for 220 to 250. I know the 20D is only 8.2mp, but it is much more professional than the other two. Any thoughts?