I'd OC the snot out of your 2600k, set it to medium, and see if that makes you happy. The 2600k is capable of playing it on medium, frames will dip now and then. But having played it both on Med and High, the only real difference I see the the amount of blood. And on High, the amount of blood is unreal, it's just everywhere. Medium is a much better amount, still over the top, but it fits the game. If your happy with the performance, then you just end up saving yourself some cash. Put those extra threads to work, people always say, "get the 2500k, you don't need those threads for gaming". Time to prove them wrong.