If you're not going to OC, don't get a k unlocked CPU. Drop down to an i7-2600 and change the mobo accordingly. Sell your 5850 and use the $ saved from the CPU and MOBO to get a Radeon 7970.
So there's not much difference in real-world speed between sandy bridge-e and sandy bridge? I was looking at the 3930k because is has 6 cores and I run a lot of VM's. I'm not sure how much extra cores help with VM's though.