Upload & Sell: On
There are a lot of discussions on this exact thing, please let's not start up another one - search for D7000 and read them. In the end you'll likely find -
tons of unhappy D7000 users starting with unsharp pictures
99% of them due to shutter speeds too low, less than ideal shooting technique, and some body/lens combinations needing some fine tuning. None of these any reason to send a camera back to Nikon.
It's a high pixel density camera with great AF capable of stunning shots with great detail - but you need to really pay attention to what you're doing to take advantage of that detail.
Enjoy - it's a killer camera. I own a D800 and I just bought another D7000 if that tells you anything