I upgraded to the following:
Gigabyte GA-990FXA-D3 Mobo
AMD FX-4100 Quad Core Black Edition CPU
8GB Ripjaws DDR3 1333 RAM
I'm still using an older video card which I haven't yet upgraded, it's the GeForce 8600 GT 512mb that recommends a 450W power supply, and I just have a single 300gb SATA HDD which hasn't been replaced for a few years either.
I guess upgrading the PSU would be a good idea anyway, I'd rather have something good quality that will last me a long time than have something that runs the risk of blowing up my PC.