Choosing between Nikon and Canon is kinda like getting married because if you change your mind later, divorce can be expensive. Each brand has its own ergonomics which you'll hopefully get used to over time - and it will be hard to change once you do. Moreover you're likely to buy some lenses - and if you buy quality, there is an investment that won't go with you if you switch brands later. A camera body is one thing, but its the accesories and lenses you'll also want to consider.

If your dealer rents equipment, try renting each for a couple weeks if he'll let you apply the rental towards purchase. Not an easy decision - both are good cameras. Good luck w/ your choice.

T