WD black is a waste of money, go for a Samsung spinpoint F3, it is the same performance for half the price. the i7 is overkill for your needs, drop down to i5-2500k if OCing and i5-2400 if not OCing. with this extra money you could get a better PSU and SSD. DON'T GET A CHEAP PSU, YOU WILL REGRET IT.
EDIT: do you have a screen or not? just realized the monitor res. thing but you do not say if you need a screen or not... also do you need an OS? if not that will save you about $220, that might give you enough to bump up to the GTX 590, which IMO will be GREAT
but bear in mind, two 580s/ 590s down the line will beat the dual 6870, sure they'll give the 580 a run for its money, but you can't upgrade it later. anyways, it is personal pref, are you going to get a new computer when this one starts lagging or will you upgrade?
Not for your budget. NO way. The features it offers (mainly the NF200 chip) won't help with your rig. For an uber powerful tri SLI rig, maybe. Stick with under $180 or so boards. More than that doesnt make sense.
aww, but thats a nice red... and you can get like fifty cards in there, imagine that quad SLI GTX 590!!! or quad Xfire 6990s!! how many years will that see you through? (BTW i want to be around when people start saying "1 tb, thats nothing!) but enough of the "joking around" that mobo is open box, so i would stay away from it.
NOTE: can you get quad SLI? on my card (GTX 560ti) it only says dual SLI support