I'm not going to be super helpful, but I can tell you my experience. Today at Costco I held a 7D in my hands for the first time. It didn't feel that much different (to me) than the 60D. I know it is slightly heavier, but the lens that was attached as the 28-135. I have a 24-105 and a 70-200mm f/2.8L USM which really make the few ounces that the 7D is heavier negligible. I do like the flip out screen. I don't use it all the time, but I do store the camera with the screen protected on the inside. I like that it has Micro AF adjust... I like the faster shots per second. But outside of that, it doesn't do that much for me as an upgrade. Same sensor, but EF-S and EF compatible crop cameras.
I have also heard (completely anecdotal) that even though the 7D has more AF points, the 60D is better at locking onto targets. I don't recall if it is in low light or otherwise. But that shocked me.
The 70D rumors sound nice.
100% viewfinder with grid lines like 7D
19 AF Points from 7D
Continuous AF in LiveView & Video Recording
But that doesn't really blow me away. If they ad bluetooth, wifi, and gps (the latter I could care less about), then I would considering it, but I'm really pleased with the performance of the 60d.
I don't like the specs of the 6D. It's a disappointment and I'd rather get a 5Dmkii if I am going to approach spending that kind of cash.
Actually, if I am going to spend that type of cash. I'd consider an older 1D model. But it is just whims of fancy at this point.