>Your crops with the D7000 have considerably more pixels than >either FX cameras. Although pixels are more compressed on a DX >sensor I would have expected sharper images with the D7000.
I would not judge the performance of the D7000 (or any DX camera) relative to FX from the initial images in this thread. Several reasons have been put forward why a 10-mile-away mountain isn't a great test target. We've all seen images in other threads here which illustrate the true capabilities of the D7000