End User Intergration

I am running an AMD K62 300MHz and I have upgraded recently to test out the new WinXP. The XP seems to enable the best performance and I received higher BenchMark ratings than when I had Win2000Pro. Although I am unable to get extreme performance,it remains reliable and stable. I have heard of others who have had Windows auto-reboot happen several times and they are running more top of the line 1.7GHz. I have had it happen once. Honest opinions about XP anyone?