what about it???
intel 3570k with asus p8z77 V or asrock extreme 4??????
i5-3570k is one of the most capable gaming CPUs for your money.
My CPU usage is about 50% using an i5-3570, my GPU GTX 670 has a usage of 99%(100%) while in playing intensive games. With the overclocking you might even go further, still it's not needed, but what the hell who cares? It's better CPU performance however you wanna put it.
If your money can stretch so far, then do it!