The problem is your using cutting edge components that haven't fully matured in a low to mid range system. Skt 939 and DDR RAM is a much better bet. I've laid out $800-$900 (including PSU & case) AMD 939 DDR systems that have almost as much perfomance as this thing does with much more stability and user upgradabilitiy. In fact Conroe's, AM2's and DDR2 need probably another year to fully mature into respectiable systems.
AMD 64 X2 3800+ OC'ed to 2.2 Ghz, BFG 7900 GTX 512 mb OC'ed, ASUS A8N-SLi Deluxe, 2 Gb Kingston Value RAM CAS Latency 2.5-3-3-6, Creative Labs Sound Blaster Audigy 4, Westen Digital 74 Gb Ratop ADFD, 2x Western Digital 250 Gb Caviar SE, 3x Thermaltake Hardcano 14 HDD coolers, Thermaltake Blue Orb II CPU cooler, Zalman VF-Cu 900 Blue LED VGA cooler, Thermaltake Extreme Spirit Northbridge cooler, and a PC Power & Cooling 510w PSU.