I've had a lovely Zeta/ZYX Airy on a Fully Funked Linn, gorgeous.
A Well Tempered Arm on various decks, seems to work alarmingly well on any deck with any cartridge given it's simplicity (apparent)
A PU3/Koetsu on my Oracle, Extremely disappointing till J7 made additional weights to install inside the original counterweight, then it was rather special.
Various Roksan arms on a Xerxes, loved the deck, not a fan of the arms.
Numerous PU 2s on various decks, in spite of it's suicidal cueing tendencies, still a fave.
A Mission 774 on a Systemdek with cheapo to expensivo at the time (who remembers being shocked at paying nearly 400 quid for a cartridge (Elite MCP 555) that kept me more than happy for eighteen years and I could live with again tomorrow if need be.
Her indoors and finances meant the arm collection had to go.
My all time fave is the Kuzma Stogi S, used it on Xerxes, an LP 12 and the Oracle.
My current set up is a Kuzma Stogi/Koetsu on the Oracle, nice but doesn't blow me away like the Stogi S/Oracle combo did.
Having set up serviced loads of tables, I always loved the Aro but wouldn't pay that kind of money and honestly think the Stogi S was better. As to Linns own arms, had rather a lot in the system on occasion(never my own) and always thought, why oh why spend that kind of money when you could have a Zeta, Syrinx, Stogi, Mission or WTA for a fraction of the price, more so these days in the worl of lunatic Ittok pricing
The Zeta was something I should never have sold, likewise the PU 3 and the Stogi S, more so since I bought each of them for under £300, doubling and more my money on the Zeta, Syrinx and making a bit on the Stogi S after ten years of use. The Zeta was a peach although I think I'm a unipivot man at heart!
Best I've ever heard?, a PU 7 sporting a 3.5K Audionote Cartridge on a home brewed Lenco, although hearing a prototype of J7's unipivot in his loft many years ago still has me thinking were my finances to improve, his unipivot is the only arm I'd be prepared to pay more for than I usually pay for my cars
Long winded way of saying if you have a good Zeta, hang on to it FFS, If it's not sounding Magic, send it to Johnnie and be amazed when it comes back!