Sear is your home insulated with blown in cellulose insulation? I found a site that recommends it as the best embodied cost as well as the best insulation. It lists its advantages over other types and seems to back your claims.
Cellulose insulates better, offers more heat transfer resistence, seals the home better, and saves more energy then when the energy required to make the material, (embodied energy) is figured into total energy savings.

http://www.johnbrooks.com/articles/cellulose.htm