Yeah, I'm getting the feeling that i should go with fiberglass,
although I'm still a bit skeptical that it is as resistent to
particulate drift as they claim. the guy said you could take a
handful, hold it up to a light, shake it and not see any dust coming
off of it....

I think I need to simply be sure that I've anticipated any possibility
that we might need to later open up any of the walls it gets put
into... I'm thinking kneewalls won't ever get opened, but the attic
space overhead is a bit more troubling. I also wish fiberglass had
greater soundproofing qualities. I'm near a busy street and it would
be nice to reduce the traffic noise that I get through the roof and
attic...