Need suggestions on new build please.

Need suggestions/opinions of my possible new system.
Trying to be as close to $1k as possible.
Hoping to get it to at least 3.2-3.4 GHz/400-425 FSB. (1st time OCer)
I plan to mostly play CS:S and Warhammer Online (once it’s released) with some movie watching going on as well.
Anything I should change?
Having hard time deciding to get either 320 or 640mb VC and which case fans to replace the ones that are crapping out in my case.
Thanks for any help.

MOTHERBOARD: ASUS P5N32-E SLI Plus (400 FSB)
http://www.newegg.com/Product/Prod [...] 6813131153

CPU: E6420 (3.2 GHz)
http://www.newegg.com/Product/Prod [...] 6819115016

CPU COOLER: Thermalright Ultima-90I (Equal or better than TT120)
http://www.thermalright.com/a_page [...] ma_90I.htm
Review: http://xtremesystems.org/forums/sh [...] p?t=137838

RAM: CORSAIR XMS2 2GB (2 x 1GB) DDR2 800 TWIN2X2048-6400C4
http://www.newegg.com/Product/Prod [...] 6820145034

VIDEO CARD: EVGA 8800GTS 320MB or 640MB (Not sure if 320 extra is worth $100 more) I will be playing mainly CS and WAR, do I need the extra MB?
http://www.newegg.com/Product/Prod [...] 6814130082
http://www.newegg.com/Product/Prod [...] 6814130071

SOUND CARD: SupremeFX Audio Card (Comes with MB) Read a lot of complaints about this "card". Currently I only have 2.1 speakers. Might buy a 5.1 later on. Should I look into a Creative Soundblaster?

HARDDRIVE: WD Caviar SE16 320GB 7200 16MB x 2 (Should I run these in a RAID0 or not)
http://www.newegg.com/Product/Prod [...] 6822136074

DVD BURNER: LITE-ON 20X 2MB Cache SATA DVD Burner
http://www.newegg.com/Product/Prod [...] 6827106057

POWER SUPPLY: CORSAIR CMPSU-520HX
http://www.newegg.com/Product/Prod [...] 6817139001

CASE FAN: Noctua NF-R8 80mm Fan (31 CFM) x 4 (2 Front Intake/1 Top/Rear Exhaust) Anything better I should look at that has good airflow and doesn't sound like a jet?
http://www.frozencpu.com/products/ [...] 1_CFM.html

CASE: LIAN LI PC-65B (Already Own)
http://www.newegg.com/Product/Prod [...] 6811112040

MONITOR: SAMSUNG 226BW Black 22" (Already Own)
http://www.newegg.com/Product/Prod [...] 6824001096

All of your choices are very good. I would lean toward the 640mb if bugdet permits. Not sure about the reference to the case fans, if the Noctua are new, they are some of the best availible. I always suggest to try the onboard audio first and upgrade if really unsatified.

Raids help online gaming at all?