I agree the new P3's are peaky as hell. But you can't judge a material by one sub. I read and studied all about different speaker materials a long time ago and as far as i know we haven't had any breakthroughs or discovered any new elements... metal is still the stiffest. CF comes closest but still doesn't match the rigidity of metal. I'll have to look for what I read to enlighten you all on cone materials but paper is the cheapest by far(literally the cheapest cones you can get, it's paper for christ's sake), and doesn't come close to the rigidity of metal.