DxOMark released their test results of the Nikon D7000. The overall score of the D7000 is 80, which puts it on second place in the APS-C category after the Pentax K-5 with 82 scores:
From all measured sensors (full frame, medium format), the D7000 is currently ranked #10.
Pentax K-5 is $400 more expensive than the D7000.
FYI, scores from other cameras:
