The 970 is a load of BS, not worth what its cost is. The 955 performs just as well and the 970 and 955 overclock to basically the same level. So I would say the 955 is the choice.
Mobo-wise, I think you should pick up an Asrock 870 Extreme3. USB 3 and SATA 6 support, cheap and great for the price. The 6950 would be a good option at that resolution. WoW also doesn't exactly have that Crossfire SLI support that is so spoken about. Most Blizzard games are really one GPU games, so I suggest a 6950, 6870 (maybe...), or a 570. All around the same price point.
Memory is bleh, I like mushkin, cheap and fast.
HDD, the WD Black's ride on the name Western Digital. For the lower price of 70$ the Samsung F3 1tb performs better (as miniscule as HDD performance is but is still better) it's cheaper, and also a great respected company. Plus the Samsung F3 is probably one of the best SATA 3 HDD's out there.
The 970 is a better choice for those who would like to not overclock, as that .3 ghz does make a little bit of a difference. When you have a budget like his, why underbuy?
ASUS is a better quality brand than ASRock. They have quality and history on their side. That's not to say that the ASRock is bad, just that there's a larger sense of security buying an ASUS.
The 6950 is trash. I'm an AMD fanboy, and I can tell you it's not worth it at that cost. The 6870 is a far better deal. The 6950 is AMAZING in crossfire, but as a single card solution is BARELY beats the 5870, where the 6870 is on the 5870's tail, making the 6950 invalid.
Kingwin makes their own PSU's. That's why I chose 'em. Most companies buy rebranded Seasonics.
Ok, I agree the 6950 is probably one of the downfalls, but I didn't just suggest that... I suggested the 6870 that you have stated and the 570 as well. I'm just giving options.
.3ghz barely makes the difference. I know it does have a tiny effect but it isn't worth paying 40 more dollars. That's just absurd. The 955 is a better buy IMO.
As for mobo-wise, asrock has great history as well. Sure older boards didn't show that. But the current Asrock boards are much greater value than Asus. There isn't a difference of "security" with Asus because Newegg will refund/RMA all the same if something goes wrong.
Of course, if OP wants asus then Asus it is.
About kingwin, making their own psu is a great thing. But even though XFX is rebranded Seasonics, their great rebranded seasonics. Cheap too. XFX is a great company with lifetime warrenty so you can go wrong with that. Plus Seasonic is a great brand, their is reasons for rebranding them.