High ISO noise is a personal issue however for my POV, and I do shoot professionally, I was able to take my 7D, 50mm 1.4 and 35 1.4 (borrowed from CPS) and shot roughly on average 1200-3200.... Noise was barely visable at 100% on most of the shots... Yes, on some of the darker shots 1.4 wasn't quite enough, but so is the life of low-light photography (especially when flash isn't allowed in the venue.)... For the most part, I was very comfortable showing these photos to clients and bands, however, my opinion is not yours so take that for what it's worth.
Between the 7D and 5D mII, professionally, I shoot right now with the 7D. Quality, for a crop camera, is very good or up to 100% at 11x17's. Unless you are shooting primarily 3200-12800 iso and printing 11x17's and bigger, I wouldn't be too concerned about quality. That being said, I fully expect to upgrade to the 5d M3 if and when it does show it's face in the wild, however given the advantages of AF, Level, flash commander, multifuntion button, weathersealing and I fully expect the new 5D to have some if not all of those features... I cant quite stomach losing those features to get the current 5D mark II. But then again my needs aren't your needs. Do your homework and go to your local store and play with them... hold them... see which one grows on your hand better... and then make your decision.