This is one of the biggest myths in audio- that certain types of equipment might favor a certain kind of music. The fact is the equipment does not care and does not exercise any taste at all.I agree, Ralph.
A good turntable will treat all kinds of music the same.
At the end of the day, if you optimize (to the extent possible) for a particular genre of music, you will ultimately lose, and shut down your musical choices. Today, you're into Led Zepplen, tomorrow, it might be Liszt. It's all about expanding your musical choice.
Having said that, and knowing that no audio product is perfect, the strengths and weaknesses of a particular design can either be masked or hyperbolized by different musical genres.
Cheers,
Thom @ Galibier Design