Right then, I've got an FM transmitter (second type) and it's poo. I can't be doing with having hundreds of cd's lying around. My SatNav plays MP3's but it sounds a bit tinny and grates a bit after a while. Unfortunately my car doesn't have an aux-in socket, and it's a company car so I can't switch the radio system out. Is there a set of speakers which are small enough to fit in a glove compartment and give out good sound?