Best MM?

Just put a new Virtuoso ebony in my system on Thursday. It's not broke in yet but is showing great potential. Other MM's I've tried that are very good:
empire 4000 diii with bliss stylus
Grado signature with XTC stylus 

That said, chakster & lewm have a lot more experience than I with MM's...

Clearaudio Charisma V2

Virtually all Clearaudio MM cartridges are internally various Audio-Technicas. If I was after the Audio-Technica house sound, I personally would just get the top of the line VM760SLC, save some money, and call it day.

Inna - New from Audio Compositions.  Retail is $1025 now.  You can email them for a price.

+1 on the Shure V15 type Vmr cartridge. I took a chance and paid $152.00 for the cartridge put a jico sas shure stylus in the cartridge, upgraded the head shell and tonearm wires and haven’t looked back...
My phono preamp, parks audio budgie tube phono preamp with upgraded vacuum tubes.