I have taken up the hobby of restoring old knives and sharpening for friends. Most of the knives I'm getting are in pretty bad shape and need a lot of work. I have been using some harbor freight diamond plates but I don't care for them and I like the feel of water stones better. I currently have a Norton 220/1k, 4k/8k setup, but I hate the 220 stone, it practically dissolves when I'm working on it. I've heard good things about Naniwa's 400 and 600 grit pro stones. Does anybody have experience with these stones? I'm going to need something that can remove a lot of metal quickly, doesn't disintegrate like the Norton, and is a water-stone. I don't like diamond stones (cost and just don't like the feel of them) and natural stones like Arkansas stones are nice but too messy with all the oil. I've narrowed down my niche to water stones. Any help would be appreciated.