Well I configured a computer using Zircon's configurations from an old thread with some slight tweaks.
I used AVAdirect.
CUSTOM COMPUTER, Core™ 2 Extreme DDR2-800 SLI Performance Series System
# LIAN LI, Classical Silent PC-6070Bplus II Black Mid-Tower Case, 450W PSU, ATX, Aluminum
# ASUS, P5N-E SLI, LGA775, nForce 650i SLI, 1066MHz FSB, DDR2-800 8GB /4, PCIe x16 SLI /2, SATA RAID 5 /5, HDA, GbLAN, FW /2, ATX, Retail
# INTEL, Core™ 2 Duo E6600 Dual-Core, 2.4GHz, 1066MHz FSB, 4MB L2 Cache, 65nm, 65W, EM64T EIST VT XD, Retail
# NMEDIAPC, ICETANK CPU Cooler, Socket 754/940/939/AM2/478/775, Copper/Aluminum
# CORSAIR, 2GB (2 x 1GB) XMS2 PC2-6400 DDR2 800MHz CL5 (5-5-5-12) SDRAM 240-pin DIMM, Non-ECC
# ASUS, EN7600GS SILENT/HTD, GeForce™ 7600 GS, 512MB DDR2, PCIe x16 SLI, VGA+DVI, TV-Out, Retail
# SEAGATE, 500GB Barracuda 7200.10, SATA II 300MB/s, 7200-RPM, 16MB cache
# RAID, No RAID, Independent HDD Drives
# SONY, CRX320EE Black 52x32x52-16A DVD-ROM/CD-RW Combo Drive, OEM
# SAMSUNG, Super-WriteMaster SH-S183L Black 18x DVD±R/RW Dual-Layer Burner w/ Lightscribe, SATA, OEM
# MITSUMI, Black Internal 1.44MB 3.5" Floppy Drive
# LOGITECH, Cordless Desktop® MX™ 3000 Laser Keyboard & Mouse, Black, USB+PS/2, Retail
# MICROSOFT, Windows XP Professional Edition SP2b w/ Free Upgrade Coupon for Vista, OEM
# WARRANTY, Silver Warranty Package (3 Year Limited Parts, 3 Year Labor Warranty)
This is roughly $1700. I'm not sure if there are any errors with that config. I'm sure everything would work together fine.
It seems that a desktop with this config at Dell would cost at least $300 more.
As for a power supply, what is a good idea? 400W? or should I get more, like a 600W?