Pick through my new system, please!

For gaming on a 22" LCD at 1680x1050. What do you think? What should I change?

Case:
Antec Three Hundred Black ATX Mid Tower Computer Case - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Extra case fans:
APEVIA CF12SL-UBL 120mm Blue LED Case Fan - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU:
Antec NeoPower 650 650W ATX12V / EPS12V Power Supply - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

HD:
Western Digital Caviar SE16 WD6400AAKS 640GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Motherboard:
ASUS P5Q Pro LGA 775 Intel P45 ATX Intel Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU:
Intel Core 2 Duo E8500 Wolfdale 3.16GHz LGA 775 65W Dual-Core Processor Model BX80570E8500 - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

RAM:
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL4D-4GBPI - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

GPU:
VisionTek 900244 Radeon HD 4870 512MB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

DVD:
SAMSUNG 22X DVD±R DVD Burner with LightScribe Black SATA Model SH-S223Q/BEBN - OEM
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

OS:
Microsoft Windows Vista Home Premium SP1 64-bit English for System Builders 1pk DSP OEI DVD - OEM
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


$1200 after shipping and tax.

Please criticize mercilessly, I don't want to waste my money.