want either the Naninwa 3000 Super Stone or Imanishi 4000 to go between my bester 1200 and arashiyama 6000. Any advice ? am I just splitting hairs here?
The Naniwa is very soft. You don't really need a bridge stone to the 6K, but the Iminishi I understand is the better stone of the 2. As an idea, eventually you might consider getting the Iminishi along with a great stone like the Gesshin 8K.