im looking into upgrading the family computer (Pentium II 400 gateway (ugh)). i found this and thought it might be worth a try. they have a Celeron 766 for $129, Celeron 1 GHz for $159 and a Celeron (Tualatin) 1.2 for $169... anyone had any experience with one of these? also, how big of a power supply would you need for either the 766 or 1.2?