Just sold my classic Corvette for a cherry '04 CTS with 3.6/5spd & all sport & luxury options. Car has just 15K miles. Have Bose radio/cd. Documents suggest XM Satellite Radio but don't think I have it. Is it true that it didn't come with Sport Options? Also any guesses on life (mileage) expectancy on engine? Driven easy w. fresh Mobil 1. Will drive mature/normal conditions. Could it make 200K? Also, brake rotors have surface rust due to sitting around. Having them turned Wednesday due to brake pulse. Is this unusual this early? Thx from NY.