Depends if you're going to use your computer for gaming or just the day-to-day computing. I'd recommend the pentium 4 prescott or the AMD 64 if you're going to be a hardcore gamer (to beat the heat, you can always buy a CPU cooling kit) but if you just want it to surf the web or do word processing, well, I wouldn't even USE a pentium 4 or AMD 64, maybe a pentium III and an AMD Athlon or something lower-classed like that.