Best Digital SLR camera for beginners that produce AWESOME reslults?

I want to start taking pictures of my baby girl who is 6 mo. SHE IS ADORABLE and already loves the camera.. I spend like 200-300 every time I go to Sears Portrait and I would just like to learn how to take picture portraits myself! I am hoping somebody can point me a good direction!
Thank You

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Canon EOS Rebel T2i 550D 180 MP Digital SLR Camera Black Kit w 18 55mm    US $550.00

Nikon D5100 162 MP Digital SLR Camera Black Kit w AF S 18 55mm VR Lens    US $690.00

Nikon D40 61 MP Digital SLR Camera Black Kit w 18 55mm Lens    US $290.00