I thought the Quad core was a faster processor but (and correct me if I am wrong) without software that can use it its an increase in money without an increase in speed. So my example game would not take adavantage of the quad, what about BioShock? Or do I need to go to the back of the class and start over?
I can only speak to gaming in general terms ... fps ... hi-rez ... etc.
Generally ... games care much more about CPU clock rate than number of cores BUT, newer games will certainly be looking for more cores, in future. If you can afford an x3 CPU and a core-unlocker mobo ... with greater than 3GHz stock clock ... go for that.