Alright, I'll put my thoughts down.
Processor: Good choice.
Chasis: Awesome case (Runs hot, get a couple high CFM fans to cool it down, if you want a quiet case, go for an antec 900 with the fans on low, or a P182)
Motherboard: Great Mobo, I love it. (Go X38 if you ever want to use crossfire though)
Memory: Go Crucial Ballistix, cheaper and Crucial is Micron's brand (Micron makes the chips inside all those good DDR2 kits)http://www.newegg.com/Product/Produc...82E16820146565
Video Card: Heeell no, the 8800GTS 512 is just as fast and cooler/smaller for 100$ less. I recommend the 3870 X2 for that price, AMAZING card.
Monitor: Nice, I like 20' more than 22 anyway.
Power Supply: I prefer PC Power and Cooling (they own OCZ brand as well).
Remember, wattage doesn't mean that much, a good 600w can run 2 GTXs.
If you don't plan on ever using ATI Crossfire:
PCP&C 610 Watt (Yes, it can easily run even a 3870X2)http://www.newegg.com/Product/Produc...82E16817703005
Crossfire maybe? (or running 4+ hard drives)
PCP&C 750 Watthttp://www.newegg.com/Product/Produc...82E16817341011
Optical Drive: Good
Hard Drive: Raptor is a waste of $$. You can get 2x 750GB for the same price. (or Quad 320s for RAID 10) and get almost the same performance.
I have a 3 drive RAID0, and tbh, it's almost the same as 1 HD.
I recommend a 500GB RAID0 for you (or skip raid and get 1 drive, which I would do in hindsight).
With RAID, remember to back up your data OFTEN.
Operating System: I'm skipping Vista and waiting for Windows 7, but it's not that bad.
Processor Cooler: Great cooler.
Fans: Thats a loud fan. I recommend the 1200RPM, but the Cosmos needs the 1600RPMs to cool well enough. As for the heatsink, I cool my Q6600 3.6 with an 800RPM slipstream, so a 1200/1600 will be fine.
Mouse: I LOVE my Razer Deathadder.