If you keen to buying a prebuilt system... I just got a Dell PowerEdge SC1420 and once I popped an X700 Pro video card in it, its wicked fast. I run Maya, 3dsmax, Photoshop, SolidWorks, as well as Doom 3 and HL2 - this machine hasn't budged for anything! Comming from a single processor (1.8) G5...