Hi Sorry if this has been discussed before but couldn't see any links Is there an AV reciever where it is possible to drive two sets of rear speakers i.e. a set of dipoles and a set of normal speakers. So it is possible to use just the front, centre and normal rear speakers when listening to SACD/DVD-Audio etc. And then the complete seven speaker system when listening to movies. Is it a waste of time!! Any thoughts/guidance/recomendations greatley recieved.