Jon, I'm going to have to keep an eye on you. You sang praises about the Gesshin 5k so I bought one, a month ago. Now you've gone to a higher tune for the 4k stone. To be truthful though I've been wanting to upgrade/replace some of my stones and one of them is my 3k SS. What do you think, the Gesshin 4k make a good fit between my 1.2k Bester and then either the 5k Gesshin or 6k Arashiyama before moving on to my 8k Snow White.