Latex in general is known as the bees knees in bedding......it will last and last and last and doesn't get body formed divets in the bed like other mattresses can......you can get it cheaper by getting a bed that has a latex top on an innerspring bottom these are lighter, easier to move etc etc.....I know nothing about the organic side but I would definitely go latex over wool...wool will conform to your body and you'd end up with a saggy mattress I reckon.