Any of you guys ever experimented with your centre speaker configuration?. I've been having some shocking problems with my Mission 75c combined with a variety of amps - TAG Mclaren, Aaron, Harman Kardon, Yamaha, Arcam. With all of these, I found the sound to be progressively more diffilcult to listen to. Very strident and insistent - hard sounding - the only words that come to mind. The more capable the amp, the worse it got. I'm currenly using a Harman Kardon AVR 603 reciever and as a long shot decided to wire up one of my old Rogers LS4a speakers in place of my usual centre. OH YES - smooth, punchy and detailed. Takes my breath away rather than scouring my ear drums. What do you think?. Is one half of a stereo main pair better than a dedicated centre channel speaker?. Any suggestions for alternative centres?. Anyone want my Mission 75c ??. Chris.