The lenses you buy will make more of a difference than reasonably equivalent camera bodies between manufacturers.
It is best to try both and see which you're more comfortable with ergonomically, as well as trying other models in the same line so you know how the "feel" is going to be in the future as you replace the body with the next model in a few years.
All modern DSLRs are capable of astonishingly good images, from the lowest-end models up. Unless you're shooting specialty images that require a certain feature, or you're making very large prints or doing extreme crops, it really, really, really doesn't matter which you choose.
Canon and Nikon hold about 80% of the DSLR market combined- there is no wrong answer between the two manufacturers, and both make a wide range of bodies and lenses, giving you upgrade options.
If you have friends or family that have one or the other manufacturer's lenses, choose that so you can borrow glass you can't afford.
A good photographer with a bad camera is better than a bad photographer with a good camera- don't sweat the camera, sweat the photography. Spend more time on lighting and composition than deciding which body to get.
Paul