Probably very few are still following this thread, so I'm going to risk a few provocative comments.
First, as to objective measurements. The scientifically-trained engineers who create the stuff we buy rely heavily on measurements to work their magic. That's an incontestable fact. So saying that measurements are irrelevant is like saying that, if you are a believer in God, knowing God's intention when creating the world is irrelevant to our enjoyment of it. That may be so, but only given certain perverse assumptions. If you want your understanding of experience to correspond as closely as possible to the Creator's, you need to know the creator's criteria.
Second, there are many ways for a system to sound good. The wine analogy I, and others, have used here and in other threads is an analogue: comparing one fine system to another is a bit like comparing a fine Pinot Noir to a fine Cabernet Sauvignon. They're different, all right, but it would be absurd to reject the one on the basis of what one values in the other, or vice versa. Bottom line: expensive systems almost always sound better than inexpensive systems, even if in different ways, and they do so to everyone, not just to audiophiles. We obsess over microscopic details that most normal people neither notice nor care about, and those constitute the majority of "debates" on this forum. But I have not yet meet a person with ears who is not impressed by a "good" system, even if such a normal person doesn't consider the cost and emotional investment necessary for assembling that good system worthwhile.
Third: Chacun a son gout/De gustibus non est disputandem. Some of us like listening to Tool or Metalica; others can't stand such music, and prefer string quartets. Some of the latter love Beethoven's quartets but can't stand Bartok or Shostakovich. Those different sorts of music are so different in character, content, and aural impact that it would be crazy to suppose there should be universal agreement about what constitutes the best possible musical reproduction. But this does not contradict my second point, and it relates that point to my first: all music—indeed, all sound—is ultimately a matter of frequencies over time. That's a matter of physics, interpreted by brains attached to bodies. So the technological devices designed by engineers to reproduce those sounds with the greatest objective accuracy will, almost always, be the ones that listeners prefer, no matter their musical preferences. A distorted tone will not compellingly convey Hendrix's feedback, nor the sweet woody sound of a fine violin.