Bah I still can't decide if I'm going to be cheap and get a

Intel Core™ 2 Quad Q9550 2.83GHz Socket LGA775, 1333MHz, 12MB, BOXED w/fan

or



Intel Core™ 2 Quad Extreme QX9770 3,2GHz,LGA775,1600MHz,45nm, 12MB, BOXED

The pricegap is somewhere around 1300~ dollars...

How much better is the processor REALLY compared to Q9550 to handle todays games (and most important: multiboxing)?