Im thinking about building a gaming pc for the first time. I am thinking about this, XFX 680i LT SLI Motherboard Intel Core 2 Quad Q6600 Thermaltake V1 Model CL-P0401 CPU Cooler OCZ SLI-Ready Dual Channel 2048MB PC6400 DDR2 800MHz Ram (2x1024MB) Seagate Barracuda 7200.10 500GB Hard Drive CoolerMaster CM690 ATX Mid-Tower Case Lite-On Super-Multi LH20A1H All That comes out to about $850 U.S. shipped from Tiger Direct. I am looking to spend no more that about another 600 dollars for the PSU, Video Card, and OS. I Want to run 8800's in sli but there are so many of them I dont know what to pick. The PSU is giving me headaches also. Modulars will make it look nice, but do I need it? And does everything need to be "SLI Ready"? With this set up how many watts do I need? Keep in mind I would like to start out with 1 video card and eventually run another of it in sli and will be adding a 2nd hard drive and DVD rom later. I will also add more ram down the line. Phew... Long post. Sorry. One more thing. Vista. I didnt really want it but if I want to be able to play DX10 games I'll need it, right? So which one should I get? Home, Premium, or Ultimate? Thanks.