I am not dissing on yamaha at all, they have excellent recievers from the 1400 on up, but I have no idea why anyone uses those DSP modes. What a waste!!! I enjoy the Denon 6 channel stereo when I am around the house or having a party, but not for true music listening. I listen to stereo or direct only for that. I owned a Yamaha as my first receiver and thought the listening modes (Disco? Theater?) were terrible. Then when I got my first Denon, was so impressed with the 5 channel mode. But I still think stereo is the way to go with stereo music.
