Dover, You wrote, "The Dynavector arms use the same electromagnetic horizontal damping to counter the high horizontal mass in their biaxial design."
Actually, the DV tonearms are some of the pivoted arms I had in mind when responding to Ralph that do deliberately employ high effective mass in the lateral plane, as you say, but do you view the magnetic device as a way to "counter" high lateral effective mass or as a way to dampen resonance in the horizontal plane? There is a distinction to be made. I always thought that it was to dampen resonance. I've got a DV505 and am a big fan of it.