In the past I've used a diamond pocket stone, a ceramic rod, and the sandpaper-on-mousepad trick to keep my pocketknives and khukuris sharp. Now that I'm spending some more money on kitchen knives, I am looking to "upgrade" to stones and plates. The fact that I've moved across the country and left my old sharpening materials behind is also a factor.
At the moment, all I have is a 180#/300# mystery stone from the local asian grocery store. I think it was less than $10, which seems ominous, but it does have some katakana (suggesting japanese origin) on it. It's not particularly flat, which is something I'm looking to correct.
Anyways, I'm thinking of buying two combination stones/plates:
8" Diamond plate 600#/1200#
Should I get a Nagura stone? Is 600# too fine of a diamond plate for flattening stones?