Get the 6950 and the i5-2500k is all you need. Also where do you partake in this beta?
+1, except that you are talking about the i7
-2500k, not i5. Little typo ^^
You'll be sparing 100$ on the cpu and invest it on the AMD 6950 (which can be unlocked to a full featured 6970 for less money).
Btw soon Intel will be rolling out it's new platform: new cpu and new motherboard chipset to go with it so if you are looking to get new hardware in a few months, these new cpu/motherboard will support quad-channel memory, USB3 right out the box (without using another company's USB3 chipset) and PCI-E 3.0 too. So if you can't wait for these techs to get on the shelves, your current rig is top of the line ^^