I am getting a Core 2 Duo E6300 and a 7900 gs with a DVD writer driver and standard DVD drive. I'm not sure what fans i'm getting yet but I probably will overclock the E6300 a bit, but want to keep the system quiet so I don't want to get lots of fans if this is possible. How many watts do you think i'll need for this. Also I will upgrade to a 8800 and quad core when they are affordable so I expect this will make a difference to how many watts i'll need.