New build?

generally pretty good, Only definite change I'd make is swap out the OCZ Summit for an OCZ Vertex. It's a much better drive, and if you buy from microcenter.com, really not much more expensive for a 120GB. an Intel 25-M G2 is even better, but those get pricey. http://www.microcenter.com/single_ [...] id=0304106

If you want to trim down your price a little, I'd recommend going for the Samsung F3 1TB x2. Most benchmarks perform better than the current gen 1TB Caviar Blacks, and are on average $20 cheaper. All you really lose is the WD 5 year warranty for Samsung's 3 year warranty. Also, your Norton 2009 security is a deactivated item. If you really want to use Norton, 2010 is available now. A friend of mine uses Norton 2009, and he said that it was giving him hell with managing his home network, blocking connections to his laptop, or xbox 360 for video streaming. This might be worked out in the Windows 7 compatibility in the 2010 edition though.

Otherwise, very solid build.

it's pretty fast at stock speeds, if it's not enough for you, the i7 920 overclocks very well. With good aftermarket coolers, shouldn't be too hard to get a stable 25% overclock following an online guide.

If you are fine with overclocking, then budget in an extra $80 for a better cooler and I would say yes, for sure. If you don't feel confident in being able to overclock and have no issues with budget, you could spend the extra $700 or so for an i7 975 and not have to worry about overclocking it. I'd still at least invest in a better CPU cooler though with a 975 since the stock Intel coolers are barely adequate.

There aren't any graphics cards I'd consider "better" right now. NVIDIA GTX 295s in SLI will still get slightly better fps in some current games, but those cards run much hotter and use more power. Also, since you will be playing new games, you'll want DX 11 support which GTX 295s are not capable of. 5870s are the overall best out there until ATI releases 5870x2 cards. At some point NVIDIA will release a powerful new card to beat them, but it doesn't seem like it will be until later next year since they are focusing on their rather pointless "Fermi" workstation GPUs.

Yes, that will be a very nice computer that will run games at high settings for a long time. RAM and graphics cards can be overclocked, but I would walk before running. Running two graphics cards in crossfire causes them to run hotter. Overclocking them just makes things worse.

There's also no need to overclock DDR3 1600 RAM. The smartest thing to do would be go into the BIOS and manually set the RAM speed/timings/voltage to the recommended specs (1600MHz with 7-7-7-24 timings at 1.65v for the OCZ Platinum RAM). Your RAM will run underclocked until you manually set it up in the BIOS. The motherboard has to do this for compatibility reasons since your RAM requires more than the DDR3 standard 1.5v. A lot of people don't understand that and wonder why their RAM isn't running at the rated speed.

Yes, everything will fit in the case and should stay cool. Your case moves a lot of air and the Noctua cooler is a good cooler. You have two top of the line graphics cards. This will be a strong computer for quite a while. You don't need to overclock the 5870's. They're plenty fast already.