Just think of it this way. The more the insulation the less it will cost to heat and maintain the temp inside. The Paper acts like a vapor barrier, so if you do the bat you will have to put a vapor barrier over that. I'm by no means an expert, just been researching it myself. I am installing R19 w paper to my walls and R 30 w paper to my ceilings. I chose bats on the ceiling over blown in (which is better), casue i will probably be spending a lot of time up in the attic installing new outlets and also have some light storage up there. If I blow if in, I will be a mess everytime I go up there.
