Upgrading my PC

It has been a while since my last post. I have been quite busy with something.

This fall, I am going to spend around $4,000 to upgrade my PC. I am going to upgrade practically everything except a case and the monitor. I have not made my final decision, but I am seriously considering of following:

CPU: Core 2 Extreme QX9650
Motherboard: Asus P5E3 Delux/WiFi @n
RAM: Corsair XMS3 DHX 4GB DDR3 (TWIN3X4096-1600C7DHX G)
Video: Hopefully new Nvidia G92, or 8800 Ultra until a new one releases
Sound: Sound Blaster X-Fi XtremeGamer Fatal1ty Pro
HDD: 150GB Raptor 10,000 RPM (x2 for RAID 0) + my current 2 7200 RPM 500GB HDDs
PSU: Thermaltake ToughPower 1200W
OS: Win XP 32-bit & Vista Ultimate 64-bit

If you have any suggestion, please let me know.