I agree the Graham is the best of these. I owned three versions of it before moving up to the Walker turntable and it's linear tracking arm.
Interesting that Extremephono mentions the arms he does. Not only have I heard most of these, I officially brought Breuer into the United States from Lucerne (his home in Switzerland) in the late 1970's.
Last I spoke with him, he had moved on to manufacturing large format cameras and still later I understand another company took over the business and is now manufactured in another facility.
I still have many photographs of Breuer at his work table. My favorite taken in the failing light of day, just before we all left for dinner. The photo includes my wife looking on intently as he puts the finishing touches on the tonearm I hand carried back home with me.
After that, I imported at least a dozen more of these high end tone arms, most with his special flycut heavy counter balance and as many of his custom built moving coil cartridges to match. These cartridges began life as an EMT, then fitted with custom aluminum cantilever and a modified line contact diamond he had manufactured by Van Den Hul in Holland.
The Graham is a masterpiece in today's world and can perform with incredible resolution when set up properly. Which I might add is near impossible without a lot of experience.