I agree that Nikon is the way to go for a medium level camera. Keep in mind, for good pictures your lense is going to be more important than anything else.
Not to say the camera isn't important, just that if you have a decent camera and horrible glass you will get horrible pictures. If you have a decent camera and fast glass you will get great pictures.
Get the fastest lense you can weather you buy Nikon or Canon.
(By fast I mean aperature, the lower the number, the wider the aperature can open and let more light in, therefore the faster the lense).
I'm a Pro-Photographer, so I'm just trying to share some knowlege.