His videos really are the best...He covers ALL systems and really gives good explanations of what each stone is doing.
Anyway, I just bought a Coticule as I was looking for another option to fit in between my King 1k (Bevel setting) and Chinese 12k (finishing). Right now I'm using a Norton 4/8 which works wondefully, but I personally am "on a mission" to condense the bulk of the honing down to one single stone. At some point I'm also planning on getting the rest of the Naniwa Super Stones (already have the 1k)...I figure it's always good to have a few options as to how you want to progress through the honing process... :)