I was thinking about what i want to do for an axhaust and i am thinking about summit mufflers. anyone own them? or heard them? my car is too damn loud and getting a headache on the way back from the track because of the drone is not fun. its not going to get any better with 4.10's either, so i need something quieter. i'm thinking about summit mufflers, dynomax superturbo, borla xrs(?), and flowmaster delta 50's opinions?