#1 I know for a fact that Alienware are good komputers
#2 I know some ppls getting prefab from Komplett, and they havent been as good as they should.
#3 I know for a fact that Nvidia GeForce are good gpu's and the Nvidia has 4GB as the Sapphire only had 3GB
#4 Never heard anyone use Sapphire Radeon cards, dono how they are, with gaming compatibility in mind, are the gpu compatible with most games out there?
#5 If you build it your self, you get the casing, mobo, gpu, cpu, psu you want, so in the future you can change it if needed, you dont need to buy a completely new rig in 4-6 years.
Note: the only reason i would want to chose the Komplett rig, is cos its a normal case, so you can change gpu and such in a few years, witch you cant in the Alianware(
http://www.dell.com/us/p/alienware-x51- ... spx?~ck=mn if you go to this page, and few scrolls down, you can choose your gpu and you actually get to look at the card, and as you can see its not a "normal" card, witch makes it harder to change components in the future)