Curious as to the majority preference when it comes to utilizing a reciever's ability to "matrix" a rear center channel from a 5.1 source. When I initially purchased my receiver, I always left it on the setting where it creates a rear center feed from 5.1 (DTS or DD), thinking that if I have a 6th speaker, it ought to be used. Recently I have been swapping back and forth between the "auto detect" and "matrixed" formats, and some of the surround fields actually sound more "full" while using just the 5.1 format. My question is how most members feel about the "created" channel. Do you feel it is better to listen to the soundtrack in the manner in which it was recorded? Or is it better to have the 6th channel "matrixed" by the receiver?