I got a D700 when it first came out and have been really pleased. I've used it to shoot critical commercial catalog and billboard images with great success. In the past I've shot the D300, D200, and D100. This has them all beat. It is worth noting that some specific camera bodies and specific lens combinations could have focus issues which can be checked with tools such as the LensAlign MII. I have also taken the time to produce custom color profiles for this camera body using the color checker Passport by X-Rite.
If you don't get stellar results, perhaps you might take one of your lenses and a memory card to your local camera dealer and shoot some test shots for comparison on a D7000 from their showcase.
Good Luck!
Bjammin