Gtx 280 sli

hey guys im new to tek syndicate i just got two gtx 280 for sli, I spent 160 bucks i only game at 1680X 1050 would i have notcie i big differne with a new card.  it seems to run everything on high or ultra in dx 10 of course i think i should just wait till the new cards come out . so is the gtx 280 sli config still good for gaming?

At that resolution, I suppose. Overall, a single 7770 bests a GTX 280 though, and only spending $20 more than what you spent on that GTX 280 could have gotten you a 7850.