Hello all, I'm a noob to DSLR photography, and I am considering the canon xsi. I don't need professional, just looking to improve photo quality and have more options for shooting manually than i have with my sd600 point and shoot. 1) How large of print can I produce with the 12.2 mpg camera (rebel xsi)and have it be clear. I am interested in decorating my house with my photography and framing large prints as gifts. 2) I have heard of mpix.com for photo prints. Are there any other site suggestions?