hi Amat It looks like acerbits answered your questions. NCIX is where I purchased my system. Use the price match or their weekly specials It is best to get a board that is vista compliant. Which I think just means all the drivers have been tested and work. NCIX sells the oem Vista when you buy the components from them, and you get the disk. The power supply must be able to power all the components, for 4 lcd's you would need 2 cards or a quad card$$$. The main concern for power supplies is that they are high quality as the cheaper ones can give you problems. The case I got ,Sonata III, power supply is supposed to be good. Another thing is that I had the shop assemble it all for me and install vista. only cost $50 and saved a few headaches.
thanks Adobian，since I have no experience of bios twinking I probably will go with an easy one.
Having a shop assemble it for you is a very good idea, especially true for me. I will check with futureshop or bestbuy to see if they can do it for me. Basically I am planning copy your system and go with the RAID 0 setup. Not sure which RAID controller is good though. Thanks Andrew