Re: oppinion on new motherboard
get a reputable motherboard (Asus, MSI, Gigabyte, Abit, what else?) that supports socket 939 using Athlon 64 CPU and dual channel memory support (most do because of new chipsets). I like to go with PCIe, but some still stick with AGP. Performance wise, they're pretty similar at this stage.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?