Motherboard: Asus P8P67 EVO ($190)
There are cheaper motherboards out there with the same/better features. I'd go for a Z68 board at this point, because they're about the same price, have the integrated graphics as a back up, and still have all of the other same features as the P67 boards.
CPU: Intel Core i5-2500K Unlocked ($215)
The standard gaming CPU these days. You stand a good chance of getting 4 GHz without even touching the voltage.
CPU Cooler: COOLER MASTER Hyper 212 Plus ($25)
This is a great cooler, especially for the price. You could invest in a better cooler in the $50, but the Hyper 212+ should be more than capable for the OC you're looking for.
The LCS systems are starting to get better, but are still expensive for the small increase in cooling you get. A lot of < $50 coolers do as well or better than $80 LCS systems. IMO you should just go for a custom loop at some point, but that might be because I've done one and it starts to get addicting
RAM: Corsair Vengeance 8GB ($80)
What are the specs on this kit? $80 is kind of a lot for an 8GB kit these days, since G.Skill has been selling a lot of theirs around the $50 mark recently, and they're one of the top companies in the business.
Video Card: 2x MSI GTX560 Ti ($500)
First - What resolution are you gaming at? The resolution will somewhat affect your video card choice; the 6950/6970 perform better @ 1920x1080 and above, the 6970 is the best @ 2560x1600, and the GTX 580 is the single card king @ 1920x1080.
Second - I would invest in a GTX 580 rather than 2x560Tis @ 1920x1080. You won't be able to upgrade in 2-3 years without buying completely new GPUs, whereas you could purchase another 580 and just drop it in. The performance in the two setups will both be beyond 60FPS, so you won't see a difference.
Hard Drive: SAMSUNG Spinpoint F3 ($60)
Best platter drive out there. Good choice.
Case: In-Win Dragon Rider ($150)
Newegg has it for $140 - $20 MIR :
http://www.newegg.com/Product/Product.aspx?Item=N82E16811108376
Power Supply: Cooler Master Silent Pro Gold 800W ($160)
Though the Gold series is starting to get good reviews, there are more common and well reputed power supplies in that price range (Corsair TX or HX series, Antec HCG). 2x560Tis will require about 750W, and 2x580s will require about 900W (if you want to build for a future upgrade).
Additional Fan: CM Fan ($10)
Which fan(s)? Are you looking for an exceptionally good fan or extremely quiet fan? There are a lot of choices so there are ways to meet your wants (not needs) here
I Would get he 1.25v RAM and lower the timing, go to newegg.com and type "1.25v" and/or look for the new Corsair Vengeance 8GB 1600MHz with white coated heatsink which is design to make every heatsink fit(You should understand)...
1.25V RAM is a bit unecessary, especially because 1.5V is all you need and 1.25V is pretty costly for that small voltage difference. You can OC and game perfectly fine on 1.5V Cas 9 1600MHz RAM.