You could get a 6950 and unlock it, unless you want the warranty too? If you want the warranty, I'd consider another 6970, as I've heard a lot of bad things about XFX on this forum.
Why the i7 2600k and not the it 2500k? Unless you're using heavily
multithreadded programmes all of the time, the performance is almost exactly the same, and with hyper-threadding on, the i7 can even perform worse than the i5 in a non-multi-threadded task. What will you be using this machine for? If it's just gaming, I'd suggest just the i5 2500k?
The p67 sabertooth is supposed to work well, but do you like the aesthetics of the board? Or did you list it because the previous iterations have been good?
It does get good reviews, but it's missing some things like a power/reset button on it, and largely has many of the features of the other Asus boards, which you can get for a lot cheaper.
What exactly is it that you're after in a motherboard? There might be one better suited to your needs (although I don't have much against this one).
While I couldn't find a review for the psu that you picked out, I did find a few that you might find comparable, of other products they sell:
Personally, I'd go for something else too, but they don't seem like bad power supplies.
My suggestion for a power supply is something around the 800-900W range. As far as I'm aware, 6970's draw a maximum of around 300W (Looking at the connectors alone). However, as I understand it, it actually scales back its load to lower its power draw past a point.
As such, you could limit it a little lower, in reality, I'd be surprised if you drew over 200W with these cards. (Linky
showing 300W of power-draw).
However, to account for the possibility, if you're looking at crossfiring, an 800W, or even a 900W power supply wouldn't be completely over the top. If you're the kind who likes to stress test their whole computer at once, overclocking your CPU in the process, and running multiple power-hungry usb-devices and hard drives etc you could hit a 900W total system power draw.
For the gamer though, 800-850W ought to be more than enough.
Have you considered other graphics card? Where the 69-series excels is when displaying across multiple monitors (thank you 2GB of GDDR5). However, for most other intents and purposes, I would probably suggest the 570. Also, according to some reviews
, when in crossfire, they're not very nice to deal with.
As I understand it, the P67 boards all support both crossfire and SLI, so I'd recommend going with the 570 if you can find it at a comparable price, and you're not getting a 6950 to unlock.
As for the Power Supply, I'd suggest any one of:
Cooler Master Silent Pro M 850 W
If you have the right case (An Antec 1200/P183/193), I'd suggest the Antec CP 850
, or for a little overkill an Antec CP 1000
, but otherwise give it a miss. It's not a regular-sized power supply.
At the 900W point:
Antec High Current Gamer 900W
Above the 900W point for comparable prices:
Corsair TX 950W
Hope that helped