Gonna wait for the new LGA2011 or Bulldozers first, if no new solid gfx card series is out by then, will get a GTX580.
I've already pushed my current i5-750 + GTX460 as far as it can go so maybe I can sell it off and used the extra money for SLI, didn't have the funds to go all out but now I should be loaded enough and ready.
I do more than just playing FPS and RTS on max quality so this needs to be a solid investment.