Yea basically the popular chips out right now for overclocking seem to be the AMD Athlon XP 1700+ Thoroughbred (like Shady06 said from excaliberPC.com cause they guarantee a certain chip), the AMD Ahtlon XP 2500+ Barton which can get some pretty amazing overclocks as well, and the P4 2.4C. I think right now, as far as the AMD vs. Intel rival, either can be purchased with pretty good satisfaction. Athlon XP's are cheaper, can overclock better, and are generally faster per clock cycle than Pentiums. Pentiums are a bit heftier with a IHS to prevent dies from cracking and come with a very nice retail HSF solution. They have higher clock speeds and have the performance edge in general right now over AMDs. As for overclocking, both sides have very nice motherboards and both can overclock tremendously on air cooling alone. So, uh, flip a coin.