Wow that's a of good stuff thanks. I will take a look at the roxul. Looks pretty inexpensive which is great. What do you think of the acoustic mass loaded vinyl sheeting? From what I read if you put it between the drywall and studs it basically reduces the amount of bass vibrations that travel up the studs and into other areas of the house. Also is there any benefit to doubling up on the drywall?

It all matters.....just not that much.