Perlite and rockwool are available. Prices can vary according to installer. The general public is mostly unaware that CFC's can exist in insulation. Cellulose insulation is commonly accepted. Cotton insulation is attractive to environmentally-aware individuals and those doing their own insulating work as it will not cause skin irritation.
Perlite insulation is relatively unknown to the general public.
Cotton and perlite are not likely to be negatively perceived. Rockwool is relatively unknown as a modern insulation option. Must meet flame spread and smoke density requirements, listed in Section R-217 of the CABO One and Two Family Dwelling Code. As a loose fill material applied in attics, install baffles to keep the material away from soffit vents. The baffles will also prevent wind from the soffit vents through blowing the insulation.