Best Amp for Timbre, Depth and Spatial Resolution?

Don't forget the initial question of this topic! Give some brand names and stop arguing to know who has the bigger P...
Everything you say about optimization is right. Using an Audissey pro is the easiest way.
Amps are of course too different to be affirmative on the final result and you also need to try them on your specific speakers to get the perfect synergy.
So the question is too twisted to be answered : Best amp do not really exist without the rest of the system!

Geoffkit,

It was Julian Hirsch (RIP), a highly respected reviewer for decades. He did not say that amps (or any other compnents) that measure the same, sound the same. What he did say was that if the measurements of two amps were very good and close to each other, both will sound very good and then it is a matter of personal taste which one prefers. In other words, he established the objective, so the buyer could apply his/her subjective taste. Most reviewers today only focus on the subjective.

Neal

I sold Tact in the past, also there room acoustic system. We were not a fan of it. The sound is far from natural. And it sounds even clinical. The demos they give are most of the time dissapoiting these days. I recently sold the Millenium Tact of a friend of mine. It was quite easy to get a much better sound and stage compared to the Millenium. I had sold him this one new in the past. I even see this as a fault of myself. Soon I will receive the new Audioquest Wild dog subcable wenn it comes out. It is a pure silver subwoofer cable with DBS72. This will give a better timing and speed. But also a big advantage in the freq range from 80-140hz. Time and technique go on and on, that is why audio is a never ending story.

Last year I talked with Pass Labs about the idea of creating a new roomacoustic system in there pre-amps. Because the highend brands still do not make a good room acoustic system. Mctosh is using the old dated version of Tact. This is not usable for highend.

All the demo's in the past with the 802N and the 800 Signature with Mark levinson were often dissapoiting. The best options I think are:

Musical Fidelity, Pass labs X0.5 series and Krell