change the HDD to a samsung spinpoint F3 1TB, that CM v8 isn't a great cooler for the ci7 920, maybe get a thermalright ultra 120 extreme or a prolimatech megashadow and some decent fans.
For the price of those GTX275's you could get a HD5870 or almost 2 x 5850's Both options would use less power, produce less heat have DX11 and eyefinity.
The HD5870 would be slightly slower than 2 x 275's but IMO the pro's outweight the con's.
You don't need a Ranpage II Extreme if your only overclocking to 3.8Ghz, you could get a much cheaper motherboard and still get 3.8Ghz. Also corsair dominator RAM is overpriced http://www.newegg.com/Product/Product.aspx?Item=N82E16820144368