If you plan to spend over a $1000 why not go with something that is better than Canon 7D.... So Nikon D7000 is the best choice. Spend $300 more and get the best in the market. I tell you you will regret getting d5100 or even d90.
If you need answers google best DSLR for 2011 and you can get the answers. Canons are good but the body is not as great as Nikons. Canon gives you a lots of problem down the road.