im currently running a msi p6ngm2 motherboard with intel core duo 2.2ghz processor, 4gb 667 ddr2 ram. have a 232gb hard drive, and a 1.5tb hard drive, and i have a 450 watt psu with one 12v rail of 25 amps. most decent video cards require more than my psu can dish out, so should i upgrade processor, and psu, or should i upgrade mobo,processor, and psu. i want to have a very decent gaming pc. i dont know if i should get a 3ghz duo, 3.06 ghz quad, or go with one of the i series cpu. whats better in the long run???? thanks in advance to everyone who gave advice.