4 way sli gtx 780 ti, or wait until the 790s come out and go 4 way sli on those, full loop custom water cooling setup of course.. You MIGHT be able to run 1 bot? might only get like 10-20 fps tho :\
Edit: you might need that new 1500 watt power suply from corsair, and i would suggest going with a i7 4930k 64 gb of corsair dominator platinum memory clocked at like 2800 mhz? and an asus maximus vi extreme would probabley help abit hope this helps, should be around the same price as your current budget