Either one of them will allow you to create some very nice photography, and both systems have an extremely capable selections of lenses... so my advice is just to figure out which brand more fits your personality and makes you feel more comfortable and happy... Nikons and Canons are distinctly different in ergonomics, personality (Canons focus and zoom backwards...
) and overall style. They feel different. They look different. They both take excellent photographs and are popular. For a pro, there might be valid reasons to choose one brand or the other, based on how they intend to use them, but for a new dSLR user, don't get too caught up in that because your photography will more likely be more personal and general in scope, which they both do just fine. Unless you have a compelling reason to choose one over the other based on a specialized lens choice, video options, or some other issue, the things that will make you happy are ergonomics, feel-in-hand, and just feeling like you got your money's worth... I've owned both, and know great pros who use either brand.
And, as stated, unless you think you'll be acquiring a collection of pro lenses and getting super serious, you should also consider the new
Pentax K-5 camera, which is getting good reviews. List price on it is higher than the D7000 or 60D, but I'd check actual prices on the street before I ruled it out. Looks like a very capable camera which is better built than either the Canon or Nikon.
