Im running a similar system and i think i got a good balance of fast, fairly cheap and fairly low power. Xeon X3450 Intel 2320GPLC 4 x WD Caviar Back Fractal Design R2 Case (with 3 extra fans total) Corsair VX450 450W PSU (made by Seasonic but distributed cheap by Corsair) Still waiting on 4GB RDIMM...