I heard some good things about the RS Berkeley sopranino. Chris Potter had some postiive things to say. Did you find the ergonomics better on the Berkley? Which tone did you prefer? I don't think I would pay $2000 for a sopranino since it would be more of a fun instrument to play around the house or take it with me on travels. The Chinese nino sounds like a good bargain for the novice sopranino player. If I get really into playing the nino than I would entertain the Berkely or Yani.This is the one I have:
I recently tried a RS Berkeley - Very nice horns. (Different level completely) One thing I noticed on my Chinese horn is the extreme off set of the upper and lower stack. The Berkeley stacks were almost in line more like a VI soprano.