I have readed the post about Audiogon.
I'm agree with this in the post :
"Its everything I liked about the OC9-mk III, but it goes far beyond the OC-9 in every respect".
I have bought this AT-OC9 ML III (if I can't found my post on this forum

).
I have 2 AT-ART9 now. One for my VPI Classic 3(1 year for my cartridge) and one for my Technics SL-1210 MK II(1 month for the cartridge and perhaps 30 year's old for my SL-1210 MK II).
But I think ART9 is more neutral than OC9 ML III.
OC9 ML III : more medium ( I would say more medium for voices)
ART 9 : better than OC9 ML III in treble, bass, extrem treble and extrem bass...
And the sound about the two turntables ?
I prefer listen electronic music with my Technics like Kygo or Jean-Michel Jarre...
Cables, you can see is Van Den Hul.
I prefer listen Jazz, OST, Pop, Rnb, Disco with my VPI.
I can say if this ART9 is better than cartridge over 5000$...
In France, price paid is : 1100 Euros including Taxes (20%) so, perhaps the same price in the USA ? 930 $ with taxes ?
With the ART 9, I have a tri-dimensional sound.