Looking at the future with more and more DX11 games you will be better off with the 6950 but it's really up to you if you are willing to pay the extra bucks for that. If you have the money go for it. Not sure if the CPU won't bottleneck.
personally I highly recommend going with a single card 4850 crossfire is on par with a 5850, not to mention the microstutter that you will inevitable deal with when going with a low end crossfire config, you are much better off with a single 6950 or gtx 560ti
Well, I certainly hope the article I referred to is wrong. Granted, Lenzfire may not be a reliable source of information. Still, there may be some truth to it, which I hope is not the case.
In both the articles, the source is mentioned, you could have given a look into that too. Though it's manufactured through 40nm process the architecture and other details remains the same. Only possibility, why AMD goes back to 40nm is manufacturing issue with TSMC and Global Foundaries. It's just the current scenario referred by Elaine Liao, sales Director, Powercolor. But HD 7000 series is going to be manufactured by 28nm - is the statement made by AMD officially in July.
Whom to believe, AMD or Powercolor, a close collaborator of AMD?