I think most guys know turbo is the next practical step up from the M90. Keep fresh oil in the stock one and it will for sure outlast the transmission.
Most stay with the blower cause they can't afford the turbo and everything associated with it. However, those that do upgrade never regret it. The car becomes a different animal to drive and puts you on a whole other level.So, can the M90 hold it's own, or do most of the relatively serious guys step up to the turbos?