If you want to go crazy...
Any decent motherboard SLI compatible on sale (I like asus and gigabyte)
Corsair hydro series h100i
2X gtx 670
A corsair modular PSU at least 850w to be safe.
A good case - I like corsair carbide 500r (yes, I reeeealy like Corsair)
Low profile ram, at max 1.5V, some good deal you can find (maybe corsair vengeance
If you want good sound xonar essence stx or at least a xonar dg but watch out for motherboard space!
About monitors... If you don't want more than 1080p @ 60 hz, then just buy a good Dell ips, they're good quality. Alternatively, Crossover 27q.
Get some gentle typhoons 120 mm fans and I guess you're good to go!