I have a nano that I want to kept charged (gym use) I have a bedroom with no music =( I know I can get a ipod dock speaker thing but I need speakers that are removable and powerful since: A. My only power source is in the closet. (gonna run the speakers) B. I need to hear it in the room and the adjoining shower. C. Would like some decent bass I have a dock and it has an (out) plug so what do you guy recommend for using that dock with? Thanks for any input!!