da3491: Custom PC Check? (Wireless)

da3491: Custom PC Check? (Wireless)
It'd be a great deal of help to me if i could have someone check and see if this all works together. Im new to this kinda thing, so any suggestions at all are appreciated. Thanks for the help!

CPU-AMD Phenom 9950 BLACK EDITION 2.6GHz 4 x 512KB L2 Cache 2MB L3 Cache Socket AM2+ 140W Quad-Core Processor

Motherboard-ASUS M3N72-D AM2+/AM2 NVIDIA nForce 750a SLI ATX AMD Motherboard

RAM-Kingston HyperX 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory

Powersupply-OCZ OCZ600GXSSLI GameXStream 600-Watt ATX Power Supply - SLI-Ready, SATA-Ready

HD-Western Digital Caviar SE16 WD5000AAKS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive

Disk Drive-ASUS Black 18X DVD-ROM 48X CD-ROM SATA DVD-ROM Drive Model DVD-E818A3T

Graphics-ZOTAC ZT-88TES3P-FCP GeForce 8800 GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card

Sound Card-Creative Labs Sound Blaster Audigy SE

Heatsink-ZALMAN CNPS 9500 AM2 2 Ball CPU Cooling Fan/Heatsink

Case-Ultra Black Aluminus ATX Mid-Tower Case with Clear Side, Front USB, Firewire and Audio Ports

P.S.-I wasnt too sure on the heatsink so i chose that one. Lemme know if it will work or not. If not let me know what kind would fit. Thanks

Top Tip: Replacing an old video card?
What would you recommend? I dont want to have to replace a power supply but I do have a 500 watt standing by just in case. And I dont want to spend an arm and a leg.