I don't really know. I'm only about 3 months into putting a little more than hobbyist effort into the research. One of the biggest hurdles I think is hearing different speakers with different electronics in a timely manner. Plus consumer choice is off the charts with the different electronics and speaker pairing options!
When I whittled down my choices about my first upgrade (speakers) I was almost precisely divided 50/50 between choosing Ascend Sierra 2's and KEF R3's. The main reason I went with KEF other than I like the aesthetics way better (kind of dysfunctional when deciding on audio I know but I like visual art too, kinda like those McIntosh amps look way cool),is because I could tell they were extremely revealing by listening to demos and reading reviews online, even without auditioning them at home. So they might not be good for all music. For example, I'm not too much into classical but the Sierra 2's, as far as I can tell, would definitely tell you, in an audibly uncomfortable but very true way, when a violin didn't hit quite the right note.
Now, don't get me wrong. I want revealing speakers but figured I'd go with the R3's first so I could play any genre of music as I search out new stuff.
Now, the KEF's are revealing too! But in little more subtle way. The Uni-Q with dome tweeter obviously is different technology than the Seirra 2 RAAL ribbon. I actually want to own Ascend's eventually. But then there's Philharmonic BMR's! Those I believe would be stellar too! But 6 ohm's and lower sensitivity - Rabbit Hole! I do find myself trying to get the KEF's to be very revealing. Like when you can hear subtle the differences in the way the word comes out.
For example, do me a favor - Listen to Dave Matthew's Band song '"Oh" with your favorite speakers you feel are revealing. Listen to the second line, specifically HOW the "c" in "caving in" comes out. It sounds different than the "c" in the other "caving in line". I tiny audible mistake but pretty cool to be able to experience it. Another example is with the RAAL you'll hear, precisely when and how a singer smacks their lips, the KEF'S you'll hear it, and hear it well, but not with quite the same precision.
Of course the recording is key! There's a lot of good music with so-so recordings that render it kinda - blah... Then there's stuff I didn't think I'd listen too much like Leonard Cohen's "You want it darker." Extremely good recording. I'd never listen to Cohen for example in my car, but with Higher-Fi it's a totally different and awesome experience!
So, again, I do not know if one system can be equally good for music and movies. I'm sure a system can though if it's set up, paired well, and adjusted well.
I do know my current setup: KEF R3 L/R, Dual Rythmik F12SE's, and Tidal Hi-Fi through my Yamaha RX-A2080 Music Cast app sounds awesome! I've found i'm almost exclusively music now - didn't see that coming. And movies are of awesome too.
But I can't help but wonder if, for example, I put a Musical Fidelity M6si on top of my Yamaha, "Would music a tad, more? Better?
For now I'm pulling in the reigns a bit on budget though. I think my next investment will be getting MQA decoding into my system. Maybe some sub, low freq control mini dsp or something. I know I need to just keep learning the system I have. It is awesome!
What do you think! In your signature you Have all the speakers so you can tell me more! Do they all sound the same regardless of what kind of amp is driving them? Might it be better to have a box with ONLY well designed music first circuitry? Hmmmm.
Is higher end audio the proverbial Pandoras Box?