Upgrading from a q6600 build, I already have a Sapphire 5870, Antec P182 case, and a corsair 750w PSU. I'm planning to reuse all these components and wanted to upgrade to an i7. My main usage is gaming (civilization, sc2, wow, dirt 2) (love eyefinity, 3*1680x1050) and I don't plan to overclock.
Here's what I am looking at. My budget is fairly open: