Hello...My Experience.
Just because a piece of gear has a high price doesn't in itself mean that it will sound good. Also, what sounds good to some might not be your cup of tea.
Usually when a system has a 40K amp it will usually be paired with equally expensive components, speakers ETC.
Now the caveat. I have heard some killer systems in killer rooms - some stupidly expensive and others more reasonably priced. Achieving good sound is a matter of good system synergy...
That being said, when you hear a properly set up system at a higher price point the experience can be completely humbling.