Bro have to disagree with these points.
I went to several hifi shows in the 90s. Man were they boring! So many different makes , but nearly all play only Tsai TChin, Eagles' Hell Freezes Over and of birds chirping, Finally found what i truly enjoyed in a room where they played rock and pop songs with using Krell cd and amplifiers pumping B&W Nautilus speakers. I stayed for the longest time.
Soory i cant find appropiate words..the bass timings of a heavy metal band is just as difficult to handle as numerous classical instruments in an orchestra.
My point is, if a system is good, it should be able to handle a wide range of music (tube amps excluded). There are countless high quality pop CDs, just as there are many crap classical CD recordings.
The key to good quality is in the recording process, not the genre of music. But my last point is, vinyl records beat CDs hands down in musicality.