Agree on the Tosca, I had mine up and working for all of an hour and even with that limited experience it was clear it was delivering something no other tonearm I'd experienced had ever done (more linear, more open, more tape like etc).
I only have the one Tana but I did find that adding earthing to the BNC testing port on the rear added a soucon extra -- maybe drop in some of the Taiko ground boxes?

