It looks beastly for gaming, few things I noticed to add to the guys above:
The i7 2600k and i5 2500k will perform within <10 FPS of each other in gaming (not always in the i7's favor), worth saving $100 and getting the i5.
You seem to be missing an optical drive and operating system.
Also, where are you purchasing from? When I check Newegg I see 2 other issues:
1) That Gigabyte board is "open box", which is not a term I like to trust.
2) The Corsair H70 is out of stock/deactivated, also on Tigerdirect.
Looks like this build is around $2,200 as is.
If you post a budget and country where you're purchasing I'm sure people here would be more than happy to help you optimize it.
*Edit - I'm bored, so here is a suggestion in line with what you have chosen:
CPU (-$95): $220 Intel i5 2500k
Cooler (?): $93 Corsair Hydro Series H80
MB (+$40): $280 ASRock Z68 Extreme7
, assume you want PCIe 2.0 x16/x16 SLi.
RAM (-$30): $70 8GB G.Skill Ripjaws X 1600
, lower voltage and CAS is a good thing.
GPU (?): $1,000 MSI GTX 580 Twin Frozr II/OC
, x2 @ $500 each.
SSD (+10): $170 120GB OCZ Agility 3
, +5GB and SATA III instead of II.
HDD (?): $120 1TB Samsung Spinpoint F3
, x2 @ $60 each.
PSU (-$40): $200 OCZ ZX 1000w
, still plenty of power and 80+ Gold efficient.
Case (=$): $160 Corsair Graphite 600T
, personal preference I know but Corsair makes a great case.
+ Case Fans: $40 120mm Xigmatek Extreme Silent
, x4 @ $10 for the side panel.
+ Optical Drive: $19 Sony Optiarc 24x DVD/CD Burner
+ Operating System: $100 Windows 7 Home Premium 64-Bit OEM
Total = $2,472 (before rebates/shipping/combo deals).
+$14.50 for shipping, -$130 for rebates, didn't look at combo deals.