I use 800, 1200 and 6000 grit king stones. In looking at the micron sizes for these, it seems like 1200, 4000 and 8000 may be a better path to a sharp edge that will last a little longer than the current sharpening schedule I'm using. I'm just sharpening regular items like plane blades, chisels and an occasional kitchen knife. I can get something pretty sharp now, but 1200 to 6000 seems like a bit of a jump and maybe 8000 will get a better polish. I'm working in mostly oak and if that changes (hopefully) I'd probably be doing several projects in walnut.