<font color='#000000'>Follow-up: thanks for all the comments, gentlemen.
I tested the Yamaha RXZ1, NAD T762, Denon 3803, and Rotel 1065 (yeah, that's about $8k of equipment borrowed for the night), all directly into B&W CDM-9NTs with a digital coax connection from an older Sony CD player. The Yamaha had lots of power, but did not exhibit control over the speakers. The Denon and NAD were very similar sounding, so I would likely have chosen the Denon for its features. The Rotel, however, clearly sounded better with these speakers. Not surprising, considering they are co-marketed and such, but I was biased AGAINST the Rotel as it was twice the price of the NAD and Denon. It is worth the difference. I am waiting to be able to afford it.
An acoustic double bass passage clinched this victory: there was seemingly limitless dynamic range available at all volume levels. When we cranked it up, I had no desire nor need to turn it down, even though it was quite loud. Musical. Open. Beautiful. No distortion, no irritation: the preamps and power source were clearly superior to the other units, to both my own and a friend's ears. This graduation to a new level of audio snobbery was not intentional (I had already purchased a Denon assuming it would be "good enough" for the money), but I am now unwilling to compromise the performance of great speakers with an "adequate" receiver.
I am very pleased that I tested these in my own home at my own pace. There's no real substitue for it. Now I have proven the differences to myself and done what homework I can. I have extended my budget to the breaking level, but am pleased with where I am ending up. What surprises me is everyone else's amazement that I was willing to go through "all this work." Each store indicated that they were fine with it, but people rarely took them up on the chance to demo units. This is a big chunk of money for me, so I was certainly going to hear differences for myself before putting down cash. If your stores are willing, I highly recommend letting your own (and a trusted friend's) ears guide you. Thanks for your shared insights and enjoy those blissful melodies...</font>