I think you might have missed the mark. Truly good or excellent speakers will sound good with any type of music. This of course assumes that the system can provide the needed power, and finesse. Brands that can do this: Dynaudio, Magico, Wilson, Magnepan, Raidho, MBL..
It sure ain’t so...Let us try and explore that a bit
Start here....Play this at about to 90+ to 95 db avg (let the peaks fall where they may) on the MBL, Magnepan, Dyn crapaudio, Harbeth, etc, for starters. You will want to toss all of them in the trash can.
Joe Satriani - Devil Slide
https://www.youtube.com/watch?v=RaoQUgwh6kY
Ozzy Osbourne - Desire
https://www.youtube.com/watch?v=6-bgU8GzhiE
If you play such tracks on a Schweikert 55, Borresen, JTR, some of the JBL synthesis, some of the higher end PA speakers, etc, you may now feel like hanging on to that speaker...
But, if a dude’s listening to Diana Krappa Krall wailing away at 60db...any wet noodle speaker will work just fine...
When I get home, i will post many, many more tracks that are designed to just expose/kill all the wet noodle speakers out there and determine if your speakers can stand the acid tests or not for certain types of music...might help rehabilitate y’all from the Diana Krapparall @ 60db (playin it safe all day long)...
There is no such thing as truly excellent crap that worked brilliantly for any kind of music.