yeah the standard speakers are quite good, weren't bose the upgrade option?
regarding the air con & sunroof
depends on the year, but sunroof was always an option, but air con was standard on the 1.8T but got changed to climate in 2002 (i think)
as for actual stereo tht has to gotta make way for tv dvd headunit dunno what im gonna do bout 6 disc changer though
any half decent DVD headunit will play mp3 / wma so the changer will be redundant.
don't see the point of a TV / DVD head unit myself as its not like you can watch it whilst you drive