I like Leslie's logic on this issue, I never had a celeron just P4 and Xeon, I do think the Xeon performs best as well. Much of this also depends on the operating systems and processes that are run on the servers too. I think I tend to favor the Dual though because it has remote reboot where my P4 doesn't so that tends to sway me, but that P4 is my baby because it was the first.