Howdy Jack,
I giggled when I read "I want an AVR that is accurate in the reproduction of sound". That is the quest we all must face. Anyone who spends time listening to live music will realize that reproducing such sounds artificially have a long way to go.
We all may have different definitions for the terms "warm", "bright", and "shrill". From my experience, "warmth" cannot be achieved through tone controls, balance, or equalization. I believe any adjustments of this manner will take away from the warmth because these things are digitally processed. If one were able to take any newer receiver and simply make adjustments to achieve any type of sound quality, there would not be such a competitive industry.
Jack, we live in the same woods. Have you been to the Stereo Shoppe and done a serious "wow room" music demonstration? There is no amount of adjusting you can do to a receiver to achieve that type of sound.... There is quite a bit of money dumped into that room, and similar sound could probably be achieved for much less, but you'll get the idea. If you had not already done so, I encourage a field trip to check it out, I would like to hear your thoughts.
Great discussion!
-James