Need HELP for a $500 Budget Gamer System (For Canada)!

i suggest u wait for a few weeks till amd releases its rs780 chipset and its 3400 series graphics cards . supposedly u can add a 60$ 3470 card to the chipset and along with the integrated graphics it automatically works in crossfire mode so for a very low budget u get quite good graphics .
AMD is also touting low power consumption of the RS780 chipset reaching only a mere ~1.2W on idle and has ability to shutdown the discrete graphics when GPU load is low. this i think is a feature missing in intel boards .
of course there remains the small issue of intel having much better processors , but since yours wont be a high level system i think u should be fine there with any good amd processor .