I love the look, texture and soundproofing that comes from old plaster walls. Will blueboard (plaster board) plus plaster give me the same feel? How well does it work as a soundproofing material? What if I just put insulation in the interior walls, then use drywall?? I don't like the hollowness of drywall you get in most modern suburban homes... Also, how much more expensive than drywall is the blueboard/plaster combo???