Aeons ago I had the belt-drive equivalent, the CS-601 by Dual. They came fitted with Shure V15/iii which was daring for an automatic turntable. I tried various alternatives over a decade, including ADC XLM and a Satin high-output MC. The Shure was perfect tracking but maybe had a slightly bleached quality compared with some.
If the arm is still perfect - e.g. no sticky bearings - then almost anything within reason will work. Whether the cost of a low-output MC with step-up is really worth it, I’d hesitate. For a different ‘flavour’ you might like an Audio-Technica or Ortofon, or a Nagaoka or Goldring. My last refit was the Goldring 1006, and it has 1012, 1022, and 1042 versions. Surprisingly good, imo, and not too spendy.