Room/wall treatments for new basement?

I have the opportunity to add room treatments to new walls being constructed in my basement (can go between studs both on walls and ceiling). Walls are obviously concrete with the framing & drywall coming out ~ 8 inches. Also any recommendations on dampening to go around an air duct on the ceiling --also ceiling dampening recommendations (standard 8 footers)? Want to do it right but reasonably economical. The concrete walls are the biggest concern. Any help would be greatly appreciated! Does the standard "egg carton" accoustical foam work well in the walls?