Dear @knollbrent @tzh21y : """ the decisions I’m making so far are in the winning category, not the losing category. """
Yes.
Btw, not the OP and certainly you are not asking for something better and yes the F9 is a winner tells other thing makes no-sense and bortding to the stupidity.
I know the Lyra Kleos is a winner ( I own it and listen it in other systems as the top Lyra’s. ) but in that Lyra cartridge series exist four other models that are better: Etna, Etna SL, Atlas and Atlas SL but this in no way means that the Kleos is not a winner because it’s ! !
In those all times when existed a huge competition for the MM market with several manufacturers and even " hundreds " of cartridge model the F9 was the " horse warrior " for Grace over the world. Yes, exist other Grace models that are better or other vintage cartridges that could be better as Acutex but you or the OP are not asking for.
Your F9 can competes easily with the 2MBlack by Ortofon.
Now, this winner you can up grade in significant way through SoundSmith whom developed a stylus replacement for this cartridge and the options there are more than one because you can go from the F9 to the very well regarded Grace Ruby as @lewm mentioned.
Btw, against whom competed Grace in the 80’s: Audio Technica, Technics, Sony, Nagaoka, Acutex, Azden, Elac, ADC, Empire, B&O, Micro Acoustics, Stanton, Signet, Pickering, Nagatron, Pioneer, Sonus, Micro Seiki, Philips, Garrot, Goldring, Grado Astatic, Glanz, Ortofon, JVC, AKG, Sumiko, Fidelity Research, Exel, VDH, etc. etc.
So as you can imagine was a hard/fierce competition and was the F9 the one that grace choosed to be its " horse warrior " not the other Grace models.
R.