rockey07:

Canon Digital Rebel XTi 10.1MP Digital SLR Camera and other is Nikon - 6.1MP Digital SLR Camera.

Why are you comparing Canon Rebel XTI with Nikon D40 (6.1MP)?  Instead there is newer Nikon D40X 10MP priced same as XTI.  I think Nikon is good buy if you plan to upgade your lense coz they are cheaper.