As a long time Nikon user, I have not been dissappointed with their products so far. One thing I have heard though is that there seems to be a back focusing issue with the D7000 and older style (D series) lenses.
Peter from Michaels said they had to re-calibrate the D7000 settings to allow better focus for lenses like my push/pull 80-200 2.8. There are quite a few complaints about it on the forums etc. Has your wife experienced similar problems with her D7000? (assuming you have some old lenses)
Ok, need to concentrate now to finish off that letter to Santa
Bo