I have a 2009 Spyder RS SM5 with hindle exhaust and a KN air filter. I would like to know does the Power Commander V (25-004) increase performance and by how much. And should i get the Autotune and which one, single channel (AT-200) or dual channel (AT-300). At some later date i would like to fabricate true dual exhaust. I am a hotrodder at heart and i can never get enough horsepower. Also my girlfriend has a 2009 RS SM5 with Hindle and we like to ride hard, but safe. Thank-you for any input, Tom n Carol Staten Island, N.Y.