Flowmaster Hushpower II mufflers?

Are any of you running flowmaster's huspower II mufflers? What is your opinion of them and how would you rate them on a sound level scale with 10 being high and 1 being very quiet? I'm trying to decide on which muffler to run and room under the roadster is quickly disappearing. If I would have been using a 7 inch dual booster for brakes there would not be room, but I went a different route for better braking (little vaccum due to big roller cam). Thanks for the input! :HMMM: