Currently own a 3570k OC at 4.2ghz. Is it worth upgrading the CPU to a 4970k or to a 3770k which would be a lot cheaper due to not buying a MB. Yes i know i wont be getting any FPS gains.
If you need more threads, yes. Otherwise, no, you'd just be wasting your money.
personally i dont but i just have money to spend. Just getting bored of my i5 and want something new.
Why would you spend money just to spend money? There will be no performance increase. If you want to throw away the money, I can give you my Paypal address. Sending the money to me will do you just as much good as upgrading your CPU.
Then its up to you. For gaming though you'd be better off with a graphics upgrade.