I've heard the P965 is suppose to OC like crazy, same with the 975X. Stick with intel chipsets, nvidia chipsets worked amazin on AMDs, but NF4 for intel had major problems but idk about the new NF5 chipset. Also, if multi-gpu is something ur interested in (who would be though) and you want a newer intel chipset, MSI announced that their P965 supports crossfire. Although i think the speed is 16X/4X instead of 8X/8X.
Take a look at the DFI Infinity 975X, MSI 975X, the new MSI P965 (dont kno if its out yet), i think the Gigabyte DS3? OCed good too.
*Opteron 165 1.8Ghz
*DFI Lanparty UT nF4 Ultra-D
*HIS Hightech X1900XT 512MB w/ Zalman VF900 (Core: 690Mhz, Mem: 1500Mhz)
*G.Skill 1GB DDR 400
*Kingwin Mutant X Series
*HP IDE Lightscribe DVD Burner
*Seagate Barracuda 80GB SATA II
*Maxtor 80GB IDE
*OCZ Gamexstream 600W PSU