I think the reason you haven't gotten any replies yet is that this build is pretty damn solid all around. There's nothing to complain about or nitpick... Congrats on a well built machine. lol
Just a few thoughts... have you looked into Nvidia cards? They're more expensive to be sure, but since your oing for the i7, I assume you're not on an extremely tight budget. I like Nvidia if only for the fact that they've got PhysX which is really awesome. It's just a thought.
One more thing... have you looked at getting 2 HDD's instead of just 1? If you set them up in RAID 0, they'll be twice as fast as that single one. I recommend the WD Caviar Black 500GB or 640GB.
Its hard because their no prices or location where your buying parts from, try filling out the template for new computers on the top of the forums. It will help get your some answers.
Things I'd question about this build,
*why go with the antec 900 v2 when the antec 900 v1 is ussualy quite a bit cheaper and is really about the same quality for cooling.
*why are you deciding on the crosair dominator series? Unless your doing some major overclockign go with OCZ platuinm or G.Skill which has better timings which will increase your preformance and be cheaper in most cases.
*unless you plan on doing cf. Your power supply is over kill and you can probally save urself a few bucks with a lower wattage psu from crosair.
*Like noted above look into the WD Black series hard drives. Its worth the small price increase for the preformance increase you'll receive. (640gb or 1tb recommened - 500gb is a bit old now)
other than these comments the build doesn't look to bad
he never said he was getting corsair dominator RAM, he just said "Corsair DIMM 6 GB DDR3-1333 Tri-Kit." I assumed he is talking about the Corsair XMS3 RAM, which is the same stuff I have, it's very good and quite cheap.
Other than that though, I agree that not much info was provided other than the parts he's looking into, all of which look solid. I guess I just assumed he wanted the option of X-fire and overclock potential.
I still don't know why any gamer (or anyone whos not into video editing or something else thats really space occupying) would need more than 1TB of HDD space... I only had 240GB a few months ago, and I still couldn't fill it all up...