I wouldn't recommend that "upgrade", unless you can point to something you need, that the 7D can do better than your 60D.... For example, the 60D is good dealing with moving targets, action/sports... but the 7D is better.
However, if you were running up against problems with AI Servo/action photograpy, the I'd first point toward your lenses.... Those are where you'd see the most improved AF performance. In fact, if it were me I'd probably sell every lens you've got except for the 17-55, take the proceeds and get a Canon 70-200/2.8 IS II or 70-200/4 IS, and replace the 50/1.8 with an EF 50/1.4.