Any cartridge recommendations for a Grace G-707 arm on a Thorens TD-125 deck?

@fusian  Great recommendation!

Denon DL-301 mkII is very good on that arm.

Thank you all for taking the time to provide such helpful responses. I've already begun researching them.

While I have your attention - so to speak - do you have any thoughts on a good - but affordable - tube phone preamp to plug this rig into a Parasound P7 and A21 and then Magnepan speakers. There are a lot of good-looking preamps out there so opinions on good options would be welcome.

I think you could find an F9E or Ruby with a little patience. Then get the SoundSmith prefab stylus assembly with sapphire cantilever and CL stylus.

Ortofon Super OM 30 would be an excellent compliance match.

The Grado Opus 3 would be a good match!

Grado Timbre Series, Opus3 - The Absolute Sound