When I did my interior I used a layer of Dynamat (or Damplifier? I can't remember), then a layer of 1/4" closed cell foam and finally a layer of MLV.
I just put in the Ultimate sound pad from Appbiz in the engine bay. I'll be interested to see how that changes things.
At the end of the day, it's a sports car not a luxury sedan. One of the benefits of the 911 is that if someone calls me and I'm about to get in the car I just say "gotta go. It's about to be too loud to talk."
