I am thinking about replacing my motherboard and cpu. Area 51 case, P4 530 3.00ghz Asuus p5gd1-vm 2 gigs DDR memery, Geforece 8500 GT GPU 512mb, HD is a Seagate Barracuda 7200.7 ST3120827AS . Was trying to get some suggestions for a nice mid range rebuild. Looking at either E8400 or Q6600 for CPU. Not sure about motherboard, SLI or Crossfire is not a necessity. I have lots of questions but the main ones are- Will I need a new version or Windows XP if I change the motherboard and cpu? Will the hard drive still work with the new mother boards? And any suggestions on the CPU, motherbard, and ram combinations to look at.