No the case does not come with a motherboard ect, what you see in there is a watercooling kit. You dont really need mor pci slots, the only thing i can see you getting another one for is a sound card, or wirless card. Either then that dont really think you will need more. You want be adding any pci fan cards because you already have a water cooling kit. Windows Vista isnt coming out for a while so go ahead and built. It was rumored u needed 2gb's fo ram to run it good but who knows now.Right now the fx-60 is the best core hands down. But it will be outdated June 6th because they are coming out with AM2. And too have the best HD performance get 2..150gb raptors in raid 0...
Water cooling is actually preety safe, as long as you hook it up correctly