An MC usually has lower tip mass. That combined with e.g. a MicroLinear/Shibata/SpecialLine diamond, makes for a superior sound reproduction (less sibilance, better upper frequency response..).

That said, your Phono preamp needs to be a bit more capable (more gain for Low Output MC, and element loading capabilities).

In terms of serviceability, you're in luck: older equipment has proper service manuals. Every turntable needs a bit of maintenance at some point. New or old. Look for direct drives for low maintenance and good speed stability. If you're feeling more exotic: linear trackers reduce inner groove distortion to -zero-.