First of all, air doesn't provide the same ride quality as a properly damped shock and spring. Second, raising and lowering your car requires adjusting the camber, toe in, and alignment, no matter how much you change the height. That is, unless you like buying tires frequently. Third, the air bladders cannot be tuned to be progressive like a good set of coil overs, so they will have the same spring rate throughout their entire travel. Fourth, if air bags were the way to go, don't you think there would be more than one company making them? And, fifth, read this month's issue of Sport Compact Car and the article they have about the STi with that suspension. Many problems and complaints.