回复：想败一个新的Nikon相机，请问这里的大师们，NikonD90和NikonD7000哪个好？

Agree with John.  It would hard to buy a new D40 and D90.  

D7000 1)better resolution;  2)better high ISO preformance;  3)better focus module.  Both D90 and D7000 have buildin AF screw.  You can AF 50 1.4d.

Here is in depth comparsion D7000 vs D90 from dpreview:

http://www.dpreview.com/products/compare/side-by-side?products=nikon_d90&products=nikon_d7000