Do a Google search for "Grado dance", just to find out if this problem occurs on JMW tonearms. If it does, forget it. If it doesn't then there's no obvious mis-match and they should make music together, assuming a compatible phono stage.
Beyond that, the question "How good is X" has as many answers as there are listeners. Unless you're Socrates of course.
Seriously, what does "good" mean? Is my "good" the same as your "good"?
Help us out. Share what you're looking for, what you're hoping to hear, what would make you happy, what would leave you dissatisfied. Those who've heard Grado's could then sense whether a Grado would be compatible with you, as well as your tonearm.
Beyond that, the question "How good is X" has as many answers as there are listeners. Unless you're Socrates of course.
Seriously, what does "good" mean? Is my "good" the same as your "good"?
Help us out. Share what you're looking for, what you're hoping to hear, what would make you happy, what would leave you dissatisfied. Those who've heard Grado's could then sense whether a Grado would be compatible with you, as well as your tonearm.