I purchased the D7000 with the 18-200mm lens used, a few months ago, and I'm very happy with it.There is a pretty steep learning curve (at least it was for me) with the camera, but certainly not impossible. The warning that the 18-200 is soft at maximum zoom is probably true, but the caution to stay away from the limits of the lens pretty well applies to all zoom lenses. I liked the 18-200mm lens well enough to buy a second one for my wife's D40x. It works great on that camera also.
I say make the purchase and enjoy your camera along with all the extra lenses you have.