I agree with Timmer. The 945 chipset is a must. it will be able to support dual cores. Although people bash Intel dual cores, they aren't that bad of performers, especially the 2,8 GHz one. With DDR2 memory, you can easily overclock that baby with the 533 FSB. That is a sweet overclock. Just make sure that your using extreme cooling while overclocking the dual cores, as I hear that they can get really hot. Also btw, did I not mention that you should get a dual core later on?
ow ya, the 533 FSB will help you overclock even the 5xx processor pretty well.
Also as a side note. WOW coarsair value select ddr2 is so cheap.
Also, just as a warning, you should be doing 0 overclocking with that power supply that you have.