I have a 60D, and I love it. In the beginning I saw no use for the swivel screen, but now I'm using it quite often for shots with the camera held close to the ground in live view. (Although focussing can take a while in this mode, I always use it for shooting static things, like landscapes with blurry fallen leaves close to the camera, so its alright.) I don't care much about plastic x magnesium alloy, although many folks do. One thing I miss on the 60D is AF microadjustment, and it can be really important if you're into shallow DoF/fast lenses.
The 7D is a better camera in all areas for not much more, but it lacks the swivel screen. IMO, you have to think of your needs; there will always be a better camera for not so much more.
Bottom line: I love the 60D, but today I'd save some bucks to get the 7D because of AF microadjustment only (don't care about FPS or magnesium, and can live with 95% coverage).
(To be honest, I'm saving for a FF, but that's another story...)