I'm really a big fan of my rex but the speakers really kind of suck. From what I gather, premium sound adds two more speakers (in the wagon anyway) and a subwoofer under the passenger's seat. It's panasonic stuff, and paper cones for the woofers (not the sub). Im not happy with the sound at all - I have the regular not premium package but installed the subaru subwoofer. Anyone else, and anyone got ideas for good speakers that could replace or add to what I have?