What would you recommend I upgrade next for best gaming results?

The first thing i would do would be upgrade the motherboard with a am3 socket{asus} for the phenom ll series processors recommend a amd phenom ll x4 965 black edition or a 1055t or higher,4-6 gb or ddr3 -1333-1600mhz ram, a nvidia gtx 460 graphic card and a 550 watt coolermaster or antec psu