Re: AMD X2 3800+ or AMB 64 4000+
MSI makes a "Lite" version of their 7800GTX. It's dirt cheap (in 7800GTX standards), but stock settings aren't as high as some of the other 7800GTX's. Most people tend to buy the cheapest video cards available and OC the crap out of it. I guess they call it, "best bang for the buck".
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?