I think the Xsi takes great pictures. I love the camera. Don't get me wrong, but it is my opionion that the 7D and 5D take better pictures.
Better photographers take better pictures, not better cameras. If you want the best, and have the money for it, than that's fine. But don't fool yourself into thinking that your photos will look drstically better than if you had gotten an Xsi.
:thumbup: well said, but one also needs to realize that better features make getting the shot you want easier. There is a reason why the 5D is so popular among pros, and why most pros dont rely on a kodak easyshare point and shoot. This statement always gets way overused and taken way too literally.
Also, I wanted to add to the OP: there also DOF differences with full frame. Look it up, or maybe someone like KHM willshow up since he seems to have diagragms for everything. I dont know enough to explain thoroughly enough.