I don't really need 1Kw, however, the 750w cougar is the same price as the 1000w cougar right now. As far as specs, I am planning on a 6950, 2500k, extreme4 p67 motherboard, 8GB of ddr3 memory @1600 Mhz, 2 500 gb hdd's 7200rpm, and a bunch of fans, with the hyper 212 plus for a cooler. Howver, I am planning on upgrading to a 7970 some time down the road when the prices drop way down.