I'm looking for a new finishing stone for my gyutos. I have some in white steel and O1, cpm154, skd11 etc. Currently I'm using a bester 1200 and lightly stropping the edge on a jks 10000 or rika to refine it just a little and remove any large burr. While I'm getting good results, I'm wondering if I can get better results with a stone in the 2000-4000 grit range. I'm looking at the gesshin 4000, but it seems kinda spendy. Opinions?