Carpet and sound proofing.

Please don't get dynamat - you're buying a name and spending twice as much on a product that works just as good as other competitors. I have heard good things about hushmat, but can definitely vouch for raamat www.raamaudio.com the guy (Rick, i believe) is supremely straightforward and will take his time to make sure you're getting what you want, not what he wants to sell you. I've used the stuff on three cars now, compared to dynamat and the only difference is in the price tag... That crazy steep dynamat price tag. Hushmat can be found on amazon for a good price, too. I have read on several accounts that the home improvement deadener has a tar based adhesive. If the smell is no issue, then rock away with it on the floors, but I don't think I would use it on vertical surfaces as it may slip down on hot days (again, this is only what I've seen and read, im not sure about specific hi products).

Ah! And raamaudio also sells the ensolite pro. That stuff also really helps with the acoustics in the car and keeps sounds deeper and more rich from your speakers, not to mention it adds some softness to your feet under the carpet ;)

This isn't an ad, I swear lol I just hate to see people splurge a ton on dynamat when it can go towards a bitchin fuel injection setup or something shiny :D