I love my 7D. Unless you are a obsessed pixel peeper and love blowing up your images on your PC to sizes that no normal people would make prints at, you don't notice "noise" from any of the images taken even at high ISO's.
Too many people are way over concerned about noise and pixel peeping than taking photos, in my opinion. I took the photos I posted at ISO 1000 and 2000 and under normal PC viewing and in 11 x 14 prints they look awesome.
I don't know too many people who make regular prints above 11 x 14 unless you are in the advertising business or for some reason it is your JOB and you NEED to make prints above that size. So unless it is your job, stop worrying about noise.
I set my ISO at "auto" and get the shot, because that is all that really matters in the end.
7D's are fast, responsive cameras and they are cheap right now. Get a 7 and you won't be disappointed. I'm sure plenty of people will answer that the 7 sucks, but oh well. It's built like a tank and 8fps is hard to beat, not to mention that the AF is super fast. It's almost $2000 cheaper than the 5D3 and I have seen refurbished bodies with a 1 year warranty for under a grand at Adorama. It really is a hard camera to top for the cost.
Even if the 7D2 comes out this year I don't plan on upgrading. The 7 fits my needs and I shoot mainly wildlife which for the most part "requires" a fast camera, in the AF department and fps. I already have a great camera, so I don't need to replace it anytime soon.