Urrm, don't mean to be a dick, but it wouldn't be that hard to achieve that speed for that price.. I mean, i'd tell someone where to buy, what to buy and how to put it together, would cost them less, but luckily for you i'm in the U.K 
Hi Spetznazz
Any recommendations would be very appreciated. Any way of getting computer parts at a trade price? Surely someone must be doing just that!