I'd like to go full frame, but I don't wanna give up the tokina 11-16mm since it's my favorite lens. So maybe the 40 or 50D. I wouldn't mind having a nikon, but I already invested in canon lenses. Plus, I've used canons for a while now so I'm comfortable with the button layout. If you guys wanna see some of the photos I've taken with the 20D, follow the link in my sig