If you are willing to consider the D7000 or 60D for your wife with a super-zoom lens (which means that the extent of a camera system's lens offerings is not really an issue), why not also consider something from Sony, Pentax or Olympus that might be just as well suited, or better suited, to what your wife's interests are? Too many people never seem to consider other alternatives besides Canon or Nikon. It may be that the 60D or D7000 is best for your wife, but it also may be that they are not. For example, if your wife is more interested in a smaller and lighter camera, something like the Sony A580 or A55, or Pentax's or Olympuses latest models (I'm not as up on the latter two as the other manufacturers) might be better for her, particularly if you are talking about a camera and one lens combination. Also, whatever camera she ends up with you may also want to consider other alternatives to the Canon or Nikon (or other camera manufacturer's) 18-200 "kit" zoom, particularly lenses such as the Sigma 18-250 OS or Tamron 18-270 VC.
Finally, since the camera is for your wife, it would be best if she has a chance to try the different cameras and see how she likes holding and operating the controls of whatever is under consideration. Given that all these cameras perform pretty well (or better), and have similar features (but with some differences that could be meaningful depending on your wife's interests), a camera's ergonomics and comfort in use are particularly important.