Did I say I thought people that bought 40k amps had small listening rooms? The big 40k amps normally have enormous current reserves and crazy power ratings. I was just saying at lower levels or in a smaller room there would be less of a difference between a properly designed sanely priced amp and a 40k one.
Best thing I ever heard that sticks with me today was when I was an expat in Shanghai. It was a pair of enormous Focal Utopia speakers powered by lowly totl Mcintosh Monos that I believe were under 20k. Would a 40-50k D'Agostino have sounded better? Maybe. They sure are pretty.