Rabin Pro :
Close your eyes, forget what everyone else says and go for 3770k+gtx 680.... if you are going to deal with multiple displays buy two of them.. and i mean gtx 680..coz I roamed internet for ages trying to decide which one to go for.. amd or nvidia..simple as that
What, because AMD's higher memory bandwidth is a
bad thing to have on high-res displays, not to mention that a 7970GHz will usually beat a 680 no matter what (except in a couple of nVidia-optimized games eg BF3)? Plus they're cheaper.
FYI: The 4000-series chips will use LGA1150, a completely incompatible socket that will turn your new mobo into old junk. Either go for a 3770K now and accept that an upgrade will mean a new mobo (and the 3770K is powerful enough that it should last for quite a while before being too slow), or wait for a few months and get a Haswell board and CPU.
ASUS's ROG boards are, IMHO, thoroughly overpriced pieces of bling. At most they'll OC a few percent better than a board at half the price. I don't call that value for money.