Dear Lewm,
Suspense is the most important ingredient of a good thread.
Suspension is one of the secrets of a good working 927!
I see you are philosophically locked. In this case there is only one doctor who can help but I see he already came running into your direction.
Why is this idler drive being able to reproduce music from a record in such a fantastic way? I am sure it has something to do with the technological concept, the building quality, the big motor which summs up to a revolving stability just from the spot. You do not have it with a 930 in the same way. But look at the many good answers on these pages which should give an idea why it is the way it is.
At the moment I am using a DST 62 in my old Ortofon tonearm tracking with 6,25 p. The SUT which is transfering the phono signal to the EMT phono pre is a Neumann BV33.
You need to hear this, it is a stable, powerful and harmonic sound, not highlighting the highs or the deeps in one or the other direction. Do you mind if you are confronted with a powerful sound, clear, precise, warm & with a deep dimension picture?
This is not a gentle breeze or a softly singing bird just allowing you to do other things while listening. Here you are entangled and engaged. You like this? Whenever you have the chance to audition one of these machines which are older than we pls. let me know that I am not completely on the wrong track...