It seems like every one is doing their own thing with audyssey. While I'm totally new to recievers, onkyo just seems appealing to me , but so does yamaha, and I m still thinking about denon 3000 w , not so much marantz and don't know why ; I probley should. SO these are my choices . ONYKO tx - nr 838 , Yamaha A 840 , Denon x3000w. And I would gladly appreciate and feed back pro cons , experience whatever yo got thanks guys