I have both the 60D and 7D. The 60D's my spare body and image quality wise is excellent, however I do prefer the handling of the 7D, especially with a battery grip. The 60D has excellent image quality, but details like the smaller viewfinder, fiddly control wheel on the back and slower AF mean that the 7D may be worth the extra if you can stretch to it. The 7D also feels more responsive.
Having said that, in isolation the 60D is still an awesome camera and has the advantage of the flip out screen.