FWIW, years ago, at the suggestion of Mike at VPI, I bought a Grado "The Reference" low-output MI cartridge for my JMW12 arm. The cartridge was not a good match, causing constant woofer pumping (a sure sign of a cartridge compliance/tonearm mass mismatch), despite every effort to correct it through changing the viscosity and amount of damping fluid in the JMW's well. Plus, this combo's sound was bland and boring to my ears, lacking dynamics and also extension in the upper frequencies.
I replaced the Grado with a medium-compliance van den Hul MC Two HOMC and was much happier with the vdH cartridge/JMW arm combo. Used the latter setup for years, always enjoying the dynamic and involving sound, and had no issues with woofer pumping or mistracking.
Why not consider a medium-compliance HOMC cartridge, say maybe a Sumiko Blackbird or even the more economical but similar sounding Sumiko BP Special EVO III. A nice, slightly used one is available for sale here on Agon right now. No affiliation whatsoever with seller.
I would also think that the SS/VPI Zephyr would make a great sounding pairing as Viridian suggests.
Dave