C2D's arent that much more powerful than an AMD, the only reason C2D's sell so much is because they can OC, a brisbane core @2.8ghz matches a stock E6600 in benches, so the conroe isnt that much better, just 140mhz@ mid-high 2's(ghz). if you dont OC the conroe there crap, because AMD's 6000+ is cheaper, and faster