So, I've got a GTX 770 and I was wondering what CPU to get. I was going to get the i7-4770K for £250 but I've just seen the i5 4670K on offer for £150 and was thinking do I really need an i7? I'll only be using my PC for purely gaming but I'm wanting to game at the highest graphics settings (Only 1080p though) would a i7 be a waste of money for me?