i had been using the Kitayama mostly, for the last few months, but i've been breaking out my Suehiro white 8000 stone lately. it produces a polish nearly as good as my Naniwa SS 10k, but the edge produced has a heck of a lot of bite. talk about something that passes the three finger test! it's a little chalkier on the edges of the stone, feel wise, than i'd like for my tastes (i love the Kit, and think the Naniwa SS gets dirty and filled with swarf too quickly, in comparison), but it's nothing a little technique change can't fix. a few passes with the Kit after the Suehiro and i have an edge that is aggressive while also refined. i find that it is a pretty good all around edge. i'd love to try natural finishing stones, as well as stones like the Chocera and the Naniwa Snow White, but anything new i bought would have to be pretty amazing to be worth it over what i have.