Now that it has been decided I will be lining our masonry chimney, is there any reason not to go with a pre-insulated liner? They may be a bit more expensive but the the time and work of wrapping, pulling the metal meshing over it, etc. for the liner to get it insulated seems like additional work for not that much of a saving. Opinions? Am I missing anything on quality of pre-insulated liners? Looking at sourcing it from Rockford. Tks.