As silversnapper1 says it is down to personal taste once you've handled them as they are both great camera's. I read a review of 'kit' lenses a while back now and the Nikon came out just slightly better.
Something else to look at for later though is how much accessories cost for each manufacturer / model.
As the end of the day though you need to spend some time handling it in the shop and bugging the hell out of the staff with questions, then go away for at least a day and when you think you've decided go back and handle them again to check. Then make your purchase.
Let us know which one you go for, it might help someone else down the line