I have the system in my sig, though would like to lose the two amps and replace them with one 'musical' surround amp... when one becomes available, so it will be a while... I'm currently thinking about subs. Perhaps I haven't seen the light, but I don't see the need for a sub when I'm listening to stereo music. I've also become quite disillusioned with surround sound equipment as I'm not convinced spending more really makes much difference. Therfore, how much would people suggest I needed to spend on a sub to get decent surround sound quality? Also, would a sub make a dramatic improvement to stereo, if so what should the new price range be? BTW I've never listened to one of the things, so I don't really know what I'm looking for. My room is approx 5m * 4m. Thanks.