yes i have a 3570k and SLI 660s already, looking to either go into a 760 or getting an i7 sorry if that wasnt clear
Crap sorry. If you're gaming you won't notice that much difference between a 3570k and 3770k (or 4770k). Getting a 760 would probably actually slow you down (unless you're doing SLI 760s). I would suggest getting a 770 (EVGA SuperClocked for $340 @ Newegg (http://www.newegg.com/Product/Product.aspx?Item=N82E168...). Even the 770 won't give you a big difference from SLI 660s. If you don't have an SSD at the moment now would be a great time to upgrade, a 256GB 840 Pro will run you around $200 and a 250GB Evo is about $160 at Newegg.
Since you mention that you do a lot of multitasking and that would actually require CPU power, I suggest upgrading your CPU which would probably involve motherboard unless you're sticking with LGA 1155.
I didn't even know G.Skill makes SSD until now lol
Yea im happy with gaming performance i mean frames could be better in league i have it capped stabled at 60 about 99.99% of the time since league does drop frames every once in a while, uncapped frames im normally from 80 to 100 so i dont have gaming problems just multitasking and streaming seems to be a bit of an issue. I will be keeping the mobo, i dont see a need to upgrade to Haswell as everything ive heard and read from benchmarks is Haswell is extremely minimal difference for the price you would have to dish out, what might happen is ill get the CPU and see if i can sell the I5 and the 660s and get a couple 760s or 770s but that wont be for a couple months at least.
Im hoping but i doubt it, once the 800 series or 790s come out officially, the 760 4gb will go down in price, im very happy with the price and performance im getting from these 660s i paid roughly 165$ for each on black friday sale so for 330$ they are amazing and better than any under 400$ GPU out there right now i think. So i will get the CPU then, thanks for the help folks much appreciated