Should I upgrade my Dual CS 5000 turntable with a MC cartridge or get a Rega P6 with same cartridge?

[anmpr1]

Addendum: The Sao Win tonearm was certainly 'based' upon the Castagna, however there were differences. Notably, the headshell and counterweight design, plus the addition of an anti-skating mech. Below are photos of the arm in his record player.

 

[dlaloum]

The Revox Linatrack, with its linear tracking ultra low mass, and super short tonearm, uses (used?) a unipivot design too - it is then stabilised with a magnetic system - and then lightly damped with a dab of grease at the unipivot.

As I recall there were also designs for more sophisiticated magnetic damped versions of that arm - but those never went into production.