Hello since i cant build my own computer im looking to buy the best gaming pc on the market. I have been looking at alienware alx/aurora amd/falcon nw/voodoo pcs/velocity and others. But i just cannot figure out which pc is the best , since im looking to spend about 4-5+ thousand i really need to have some opinions on which pc is the best performing. I basically dont know if dual core is worth it or not and i most likely want the computer to have sli with at least 7800 gt nvidia cards. I really appreciate the help , hope someone can help me choose a computer thank you. Also im really liking the alx alienware if that computer is worth it which is better intel extreme or fx60?