I am looking to add to my existing attic insulation and I have talked to different installers, each praising their particular products. Blown cellulose or blown fiberglass, I'm leaning towards the cellulose, but I was wondering what experiences you guys have had. The fiberglass is not suppose to settle, but is more expensive. From what I have read there is varying reports on the fire risks of both as well as the R values. Help! TIA.