So my PC now is a c2d e4500 2.2ghz, 2gb ram ddr2, 8800gts 320mb and 200gb HDD. Later this year I want to upgrade to a r9 270 and a 1tb HDD. And even later I'll buy a fx6300, 4gb ram and another mobo. Also what PSU do you think I need. I am mainly going to be gaming on this PC. Thanks