My Onkyo 708 has 7 channel amps and the ability to play 5.1 with either rears, wides or heights. I enjoy the wides for music. I enjoy the rears for movies. I haven't played with heights for movies too much yet, so I really can't comment objectively. Would love to do 9.1, but I'd probably want 11.1 in short order! DTS Neo:x soon to be available in more AVR's, together with DSX and DDPLIIz... man, the decibels just keep on coming! Next AVR needs preouts for a 5 channel amp to do the heavy lifting. I also can confirm the 2nd subwoofer adds much to the sound quality and experience at less than reference levels (IMHO).