Get a ratcheting thing or youll be sorry. All my friends have 20ss, and was told on the phone by Sena that the 30k and 20S are fully compatible, but in reality they are not. The tracking and battery life of this thing is phenomenal. I love the simple design, natural wood finish, and strength of the hangers. Youll be doing the world a favour. If youre vain and care about that, then these are probably not for you. Go get yours! Nice and sturdy. All in all, if you?re not nearly as particular as me, any of these three speakers will treat you well. Comfortable light weight comfortable shoes, looks well with skinny jeans and slim black pants.