Personally I'd go for an I7, watercooled (thermochill 120.3, DTek blocks, Liang DDC pump), 12Gb DDR3 ram, two 4890 graphics cards, and a 4Tb raid 10 array, in a LianLi case, with a Dell 30", flanked by two 24", with a 24" tilted over above it. sorted!
RwD