Describe the "new HiFi sound"?

About "musical."

Language can be used in all kinds of ways, so I will remain open to uses of "musical."

The logical part of my brain cannot stop hearing the "beg the question" fallacy in the use of the word.

Wikipedia:

To "beg the question" (also called petitio principii) is to attempt to support a claim with a premise that itself restates or presupposes the claim. It is an attempt to prove a proposition while simultaneously taking the proposition for granted.

When the fallacy involves only a single variable, it is sometimes called a hysteron proteron (Greek for "later earlier"), a rhetorical device, as in the statement:

Opium induces sleep because it has a soporific quality.

[The speakers sound good because they have a musical quality.]

Reading this sentence, the only thing one can learn is a new word in a more classical style (soporific), for referring to a more common action (induces sleep), but it does not explain why it causes that effect.

There are really two different discussions happening here. I'm still thinking about "musical" and not "new hifi sound."

That said...

Case in point: my new speakers are much more revealing, have more air, ambience and room/studio presence in the recording but there's no etch, shrillness, or harshness to speak of. The mids are enhanced with brass, winds, strings, chimes and percussion that don't ever shade the sound but seem to burnish it, imbuing them with body that project out into the room. And the bass is propulsive, tight and expansive with all the sound emanating out from the speakers to the point where they can face with minor toe it, allowing a very wide sweet spot. 

This is the kind of description which delivers information rather than repeating the word "musical." It is doing *work.*

Would you rather listen to Elton play in an airport boarding area, or the newbie play Elton material, in Carnegie Hall, sitting in the best seat, of your selection. Which would you consider to be the more musical ?

This is another use of musical, but it's still begging the question. In this case, it's standing in for a description of the qualities which make Elton's playing aesthetically, semantically better — and that requires further unpacking. And notice — this example has nothing to do, any longer, with acoustics. So, the word "musical" has already facilitated drift of topic because of its (question-begging) vagueness.

Musical is a useless term. It means I like it.

I would agree that this is one way people use the term "musical." It's dodging the question of trying to find the words to say what is specifically happening.  I would argue there are more useful functions intended by folks who use the word "musical" — though they're only intentions and not more than that.

perhaps I tend to prefer a "natural" and "neutral" presentation from a system - one that does not sound forced or call any particular attention to itself. 

Isn't one man's "neutral" another's "forced"? I guess the question I'd pose is this: Is there actually anyone who goes into an audio showroom and says, "Give me something that is really "forced" and "unnatural"? Doesn't everyone say they want something "natural," or "musical"?