In the process of building a house now and did line the walls and ceiling with Roxull (the green stuff). However due to the forced air furnace, ducting and cold air returns, I believe the insulation will do more to keep the room warm then to sound proof. I think a better term is sound deadening.

BTW, those of us who own an EP500 or 600 might just as well build a structure in the back yard if you don't want to hear bass in the house. And even then...

paul

Axiom M80, VP180, Qs8, EP500
Epson 3020
Rotel RB-880
Denon AVR-990