the 2500K is an i5 not i7, but the i5 2500K is what you want, do not get the i7 2600K.
560ti is a good card, but not one for longevity, after a year or two you will either want a 2nd 560ti, or start kicking yourself for not purchasing a 570, and by 5 years you will likely want duel 570s (but then again, who knows about the future... it is 2012 after all lol).
700W is plenty of power for 2 560ti's, but you will want 750W if you choose the 570 route.
8GB of ram is plenty for the forceeable future. Dont worry about low CL ram as it makes no difference for games, and cheap ram will do just fine so long as it 1600Mhz, and even 1333 isn't going to be much of a penalty.
I like seagate drives, too bad they are so expensive these days, but it will do the trick. Seriously consider an SSD when the budget allows for it. They will not help your FPS in games, but man does it make things snappy and fluid for load times!
While I can find reviews on your mobo, I cannot seem to find a store that sells it. I would suggest looking at ASUS and ASRock as they have been doing very well for themselves lately. I personally have the extreme3 gen3 and am very happy with it, but there are some better boards out now for a similar or slightly higher price point.
Phantom is a good case that gets great reviews, hope you enjoy it.
CD drive should be any cheap drive $20 or less
You may want a card reader (cannot remember off hand if one comes with the phantom case).
You will want Win7 for the rig. Home premium is great for most people, but if you have an advanced network with a domain then you will want 7Pro instead of home.
Keep in mind that Intel Ivy Bridge will be out very soon, as well as motherboards and chipsets to go with it. It will not be a huge performance increase over the current offerings, but there should be quite a few more features like PCIe3, more USB3 on cheaper boards, more SATA3 on cheaper boards, Lightpeak/thunderbolt, WiDi, and a few others. If those features don't appeal to you then don't worry about it, but if I was building now I would wait a little bit.
We are also expecting nVidia to release their new GPUs soon, which could mean a beautiful price war between AMD and nVidia for some great sales/rebates on GPUs over the spring/summer, so again, if you can wait then you probably should.