The D7000 is a good camera, but so is the Canon 50D or 60D. (Canon models are usually number then 'D', Nikon does the opposite).
The 60D does have some 'less than great' reviews...but I've found that most complaints about these cameras are because the reviewer wanted Canon to release a 'better' model at a lower price. So they are partially reviewing the camera based on their expectations, not on the merits of the camera itself. On top of that, the 60D upset a lot of people because it didn't follow the path that started with the 10D, 20D, 30D, 40D & 50D. The 60D is a smaller, lighter (more plastic, less metal) than the previous model (50D)...so people were not happy about that. But if you step back and look at the Canon line up, the 60D now sits perfectly between the Rebel T3i and the 7D.
On the plus side, the 60D is one of the only DSLR cameras with an articulating screen. It seems like a gimmick, but having seen it in-person, it's actually pretty cool. It has all the latest features that you would expect from a mid-level Canon DSLR. On the down side, it's smaller than the 50D, and the ergonomics may not be the best fit for some people. The Rebels (and probably the 60D) are a bit small in my big hands, but it may be a perfect fit for you. Also, 18 mega pixels is quite a bit for an APS-C sensor, so the image quality, especially at high ISO, may not be as good as it could be. I don't know if a similar Nikon is going to be any better or worse.
For $1500, you are just in reach of the Canon 7D. This is a good step up from the Rebels or the 60D. Maybe not so much in image quality, but the camera body itself is more 'pro like' and it's got a much more advanced AF system (shoots faster too).
Another alternative for an upgrade might be a used 50D or even a 40D. Getting a less expensive camera would leave you more money for better lenses. And on that point, what lenses do you have now? More often than not, you'll get more of an 'upgrade' if you buy better lenses, than buying a new camera.
So a question to you...what is it about your current camera that makes you want to upgrade so much?