Having owned a 60D, a 550D, two 7D's and using the wifes 650D I can definitely say the 70D is the best 1.6 Crop body I've ever had. IMO it's better than the 1D MkIII I had as well, which was a cracking camera only let down by the screen resolution and the 10Mp for cropping.
I very rarely machine gun my shots so I'm not too bothered about the fps rate, but the IQ I'm getting, coupled with the superb AF system (with spot focus it would be excellent), the articulating screen for macro, above head height shots and video, the touchscreen abilities (which I'm still getting to grips with after shooting with a 5D MkIII and 7D for so long) that I keep remembering 'I can do this with it' are the main highlights for me and make the 70D the best allround crop body I've ever had.
My setup is more or less complete now, with the 5D MkIII and 70D I reckon I've about got the 2 best cameras I'm ever going to own and coupled with the range of lenses I've got and the new lighting equipment I've just received I'm set up for a long time. The only time I'll be buying more is to update my lenses to newer and better lenses when I can afford it.