Power Supply: SeaSonic X Series X650 Gold ((SS-650KM Active PFC F3)) 650W ATX12V V2.3/EPS 12V V2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply ~$139.99 (the x650 is quite a capable psu so don't bag it in with other 650W psus. It'll run 2 6970's just fine) http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Case: NZXT Phantom ~$190. (I wasn't able to find the one you're talking about since there are 4-5 models and neither of them costs as much as $190)
It's slightly past the $1500 limit but you're not really aiming for a budget build here as it seems and the parts should work quite good with each other.
If you're looking for price cuts you could swap the motherboard for a cheaper p67 but, honestly, the z one costs about the same as the one you had come up with and with the cpu&mobo combo you save 30 bucks anyway.
At this stage n the product cycle, I wouldn't go for anything less than Z68. The Z68 boards are just as expensive as the P67 boards, and you lose a feature or two by not getting one. I would personally get an ASRock Gen3 board with the PCIE 3.0, which can be used with an Ivy Bridge CPU.
What resolution will you be gaming at? There is no better card at 1920x1080 than the GTX 580. The 6970s are great at ultra high resolutions above that, but on your budget your money is better spent on the 580.
Just for reference, for 2x6970s you should get at least an 850W PSU, and 2x580s will require at least 900W. That gives you enough room to run your PSU at ~60% which gives you the best efficiencies and is the healthiest power output for your PSU.
You're really overpaying for memory here. If you're not looking to OC, you'll see the same performance out of the Cas Latency 9 kit (which I own and game on). The lower latency means higher OCs, but nowadays you don't need to OC the RAM in order to OC the CPU.
System Drive: SSD for OS and Programs only so maybe 128gb, whats the best valve for money in that size?
I'd go with the Crucial M4 or Intel 320. There have been issues with the Sandforce 2000 series drives (OCZ Vertex/Agility 3, Intel 510), but these two have worked very reliably for most people.
I'm assuming this is a writer at this price? I personally think you'll be fine with a DVD/RW drive, and you can just add a BD drive when you feel like you'll use it a lot.
Power Supply: Because i will get a second GPU what size will i need 850W? If so should i just go for a corsair?
As I mentioned before, I'd get a good 850W for 2x6970s or 900W for 2x580s. I must say to avoid the TX950; I've helped out a few people whose TX950s died (and then again after RMA). I'd pick up a good HX850 or XFX 850W PSU. PC Power and Cooling's Silencer 950 is also a great PSU (all three OEMed by Seasonic).
Cooling: Will i need any heat sinks
Go for the Cooler Master Hyper 212+. It's cheap (~$30) and works very well and should support some solid OCs down the road.
Case: NZXT Phantom ~$190. I pick this solely because it looked awesome, but is it any good?
The Phantom is a very good case. Other good options are the HAF 932/942 and the Silverstone Raven RV02
Power Supply: SeaSonic X Series X650 Gold ((SS-650KM Active PFC F3)) 650W ATX12V V2.3/EPS 12V V2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply ~$139.99 (the x650 is quite a capable psu so don't bag it in with other 650W psus. It'll run 2 6970's just fine) http://www.newegg.com/Product/Prod [...] 6817151088
Running 2x6970s on this sounds like a horrible idea. You'll be pushing the PSU to it's absolute maximum, severely shortening it's life and efficiencies. Remember that ~50-60% power draw is where the 80+ measurements are taken, and where efficiencies are at their highest.
All you get with the Asus P67 Deluxe is that bundled 3.5" USB 3 drive bay kit.
The Asus Z68 Deluxe gives you dual SSD caching (I think that newegg YouTube clip said something like that).
You can grab a much cheaper Z68 board as others have already posted.