Hello, so here is my dilemma. I have $800 I've got to spare to upgrade my pc more. Now my problem is I'm not sure what I want to upgrade on it. My ideas at first was wait and get the R9 290x then sale both my current 670's and buy another. That way I have 2 in crossfire, but with the 780ti coming out I could do the same with it. Another idea has crossed my mind I have a i5 3570k and I play a lot of mmo's and such, and my current GTX 670 sli set up allows me to already run BF4 at 90+ fps full ultra. I could upgrade my cpu to i7 4930k and also get a new mobo. What do you all feel would be the biggest performance increase out of this? thank you