When getting a DSLR, you'll be getting into picking a "system", not just a camera. That means not just one but possibly more lenses depending on your shooting needs, flashes and other accessories. Both Canon and Nikon offer comprehensive array of photographic system for evey budget and need.
Picture quality and capabilites from both systems are about equal for all intents and purposes. I recommend that you go to a seller that carries both lines and check out both cameras to see how each feels in your hand and see how the button layout and the user interface (UI) appeals to you. It becomes a matter of personal preference; in the end, you can't go wrong with either system as both cameras are capable of fulfilling your stated needs.
