Gene,
Thanks for the input. The question which was not really answered was, what is the sound quality of the Yamaha. I guess even more to the fact whats the sound quality of the Yamaha in a pure direct mode vs a 507. the concern would be under high load that I might hear beaking up of the bass, meaning its not tight and defined, or that the highs become strained and tinny, vs smooth an refined.
The features that are really attractive are the video up conversion, and the ilink for dvd-a and sacd. The dual sub-woofer outs and the RF-Demodulator out.
My main concern is the quality of the sound at continous high volume playback. It would be interesting to see what the continious current rating would be on this compared to a B & K.