The first machine I built was a Cyrix 166. It worked great for a year or two. Then I built an AMD K6-2 350 machine that I still use as a test machine. Currently, I have an AMD Athlon XP 2600. Personally, I don't see a reason to buy an Intel Pentium. I've built several machines for friends and use AMD chips. No problems. They are much cheaper and I feel they perform better.