I'm lookin to buy one of these exhausts but i don't know which one to get. its outta a HMF sport series, a HMF competition series, a DMC Comp, a 2 brothers, a FMF powercore 4, or a FMf speed muffler. i want one thats gonna sound good but not extremely loud. i haven't heard any of em before so i don't know. what's ya'lls opinion?