Difficult one...
First when everything sounds better than before. Totally absorbing and one doesn't want it to be interrupted by anything. Musicians are in the room.
Second thoughts....doubt creeps in, is it really doing what I paid all that money for. What about all those reviews. Wish I could hear the reviewers system to know if its all BS. Is it my ears?
Comparisons with friends systems help, but in the end I think it could be only experienced reviewers who are able to listen to many systems in their own room that could reach a state of objectivity here.
Ted, would be very interested to hear your views.