Ditching Dell and going back to a home built system

Please comment on my new build component choices.

After building my PCs for years, I bought a Dell the last time since it was much less money than building a similar system. After two plus years, I'm disgusted with Dell and my Dimension 9150, and decided to again build my own PC salvaging some of the parts from the Dell. While purchasing components, I decided to buy all new components, patch up the Dell, and ditch it on eBay.

From my previous builds, there were usually some unexpected calamities along the way and I got help from forums like this one. Please review my selected components and let me know if you see any glaring errors in my choices.

Thank you.

Greg

ASUS P35 Intel Skt-775 DDR2 1333MHz Black Pearl Edition P5K Premium / WiFi-AP Motherboard
ASUS EAH2600XT/HTDP/256M Radeon HD 2600 XT 256MB GDDR3 PCI Express x16 Video Card
INTEL Core 2 Duo E6750 2.66GHz FSB1333MHz 4M LGA775 Retail BX80557E6750 Processor
ANTEC Sonata III Case
Corsair TWIN2X2048-6400 2GB Kit DDR2-800 XMS2-6400 Xtreme Performance Memory
Western Digital Caviar SE 16 WD5000AAKS 500GB 7200RPM 16MB Cache SATA 3.0Gb/s

Way too much for the mobo and not nearly enough for the graphics.

What zenmaster said.

if you want wifi get a pci / pci-e card not the on board usb based card.