Nikon D5100 or D3200? Or Another Camera? Update

I am looking for a relatively cheap DSLR is the $500-600 range for general photography.

I was looking at the D5100 and D3200 and since they are priced so similarly, I didn't know which one to choose. What are your opinions on which one I should get?

I already have two Nikon lenses, so I would prefer to stay Nikon, but if you think another camera from another company is a lot better, please inform me.

Thanks for your help.

***Update***

While I was in the store going to buy the D3200, I stopped and looked at the Nex 5R and I really liked it. Does anyone have any opinions on the Nex line?