Just out of curiousity, why are you even considering a Tbird? The XPs are only a couple of dollars more for a higher clock speed. 43 bucks for a 1700+ at accubyte. 1.47Ghz
http://www.accubyte.com/applications...=AMDXP17&sc=pi
Plus Durons while they may run a little cooler, the heat issue is overblown, and durons only have half the cache and run at a 200 mhz fsb.