Hey OP, might want to keep your most updated configuration in the first post, so ppl don't have to look all over the thread for it and make redundant suggestions.
So usually builds don't last for 5 years, unless it is epic to begin with (think SR-2, SSD raid, and 4x SLI/XFire). I'd say aim for a 3yr build and save some money instead.
With that said, the mobo's a good one, and CPU's great. Although if you can wait until Ivy Bridge, do that. 3D transistors are supposed to be amazing. 37% increase in performance, or 50% decrease in power consumption, would be worth the wait I'd say.
Most of the things look good. I'd invest in a SSD boot drive if you can afford it. Go with 80gb or more, 120gb ideally. Space runs out quicker than you think
Also, decide on a good case. I'd recommend Silverstone's RV-02 or FT-02, great cases for air cooling and noise reduction. A lot of people skimp on cases, but a great one will keep your hardware cool, keep the noise level down, and not limit you in terms of future upgrades. Also a thoughtfully made case will make the computer building experience much better and your rig's inside will be that much cleaner.
As for the PSU, go with the HX 850 for modular cables. Always get modular PSUs, it makes cable management sooo much easier. Definitely worth the extra price.
Finally, the cooler. Grab the H70 and slap a pair of Gentle Typhoons on it. Either that or go with the Noctua NH-D14. Those are as good as you'll get before going water. I'd prefer the Corsair because it won't block any RAM modules, and make the inside of the case look that much cleaner.
So your build will look something like this:
Asus P8P67 PRO B3 (nice rounded mobo)
i7 2600K (either this or i5 2500K, if you don't need the HT)
Corsair H70 (or NH-D14 if you prefer, but this won't block any RAM modules)
2x Scythe Gentle Typhoon AP-15 (or AP-14 if you value silence over noise, maybe 3-4C difference)
GTX 580 (go w/ the MSI Lightning version, best one out of the bunch)
2x 4gb DDR3 12800 (brand doesn't really matter as long as you stick w/ a major manufacturer)
Corsair HX 850W (or go with Seasonic's X-850 if you can afford it, best 850w PSU out there)
Samsung Spintpoint F3 1tb (cheaper than WD's, and performs very well due to 2 platters, I have 3 myself)
Go with a nice Sandforce drive like the Vertex II. Intels are the most reliable, but Sandforce performs better, it's your call. Go with a 120gb if you can, or 80gb at least)
CoolerMaster HAF X or Silverstone FT-02. Either one should be around $200, and both will provide excellent air cooling. FT-02 will be quieter and classier looking (my pick), HAF-X will cool slightly better and is bigger, you choice.Edited by ebolamonkey3 - 5/22/11 at 9:08pm