I bought a few of these Acama Zen bowls and am extremely happy with them. Yes they are expensive, but the sound and quality is premiere league.
To put this gush into perspective, at the same time I got 3 Peter Hess phKS9-G, but am sending them all back. Despite being I think the top selling high rated bowl here, I didn't gel with the sound. There was a bit of distortion and unwanted colour in the timbre, that I couldn't 'not hear'.
The Acama Zen's on the other hand are all instant keepers. Zero criticism,
Very very clean sound, and beautiful finish.
100% recommended. You'll soon forget the price when you hear them.