Both the QSC and STM Rage 3 perform equally well. The STM has a bit more bling factor to it if you are into that kind of thing since it is all billet. Unless you plan on modifying your engine and increasing your HP significantly or you do a lot of mud riding with big tires at low RPM's , the Rage 6 would just be overkill.....Call Kris at Cold Blooded and he can explain the pros and cons of each and discuss your riding style and recommend the best setup for you.