Just ordered theAntec LifeStyle SONATA II Piano Black Steel ATX Mid Tower Computer Case 450Watt SmartPower 2.0 @newegg for $99 with free shipping, my question is this a good powersupply for my new build Intel C2d 6600, EVGA 7900 gt co, Asus P5B deluxe, Corsair XMS2 2x512g PC26400, Seagate...