Newegg all the way. Built a gaming desktop 3 years ago. Specs:

- AMD 64 3800+ Venice
- 4 GB Value Select Corsair
- nF4 Ultra-D Motherboard
- XFX 7900 GTX, 512 Megabytes
- Western Digital Caviar SE 250 GB SATA 3.0 Gb/s
- ViewSonic VX724 2-Tone 17" '3ms gray-to-gray (avg.); 5ms
- GIGABYTE 3D AURORA GZ-FSCA1-ANB Black Aluminum ATX Full Tower
- Creative Sound Blaster Audigy2 ZS SB0350 7.1 Channels PCI Interface Sound Card
- Antec TruePower 2.0 TP2-550 EPS12V ATX12V 550W Power Supply 115/230 V UL, TUV, CB, FCC CLASS B, CUL

Started with a 7800 GTX, but that artifacted, so I got a 7900 free Ran beautifully until the motherboard fried . . . gonna scrap it one of these days.
My MacBook Pro runs games MUCH faster than that rig did