It does my heart good to hear about someone who really enjoys having exquisite sound. Congrats on your system. Too many high rollers haven’t really earned their audio stripes, and are more adept at writing big checks than they are at identifying the true performers. To some degree it’s all relative to what we’ve been exposed to, but those who’ve owned and lived with that "ultra high end sound" truly know the difference. It still boils down to synergy of the individual components.
My experience has been that price is not a guarantee of fantastic sound, and there are definitely diminishing returns, but it’s difficult to avoid incurring some substantial costs to get that upper level sound. Fortunately, there are still plenty of companies driven by their passion for audio who focus more on performance than profit.