i'm just saying... don't overclock... or maybe we can rearrange your Budget to cut some cash... check tigerdirect.ca and see if you can get any of these things cheaper there... maybe then we can look at good power supplies
450 watt 33 amp is proper enough to run the system you say.. again fully loaded should only take around 400 watts.. you don't have too much room for overclocking.. but it'll run