My honing progression is made up of Naniwa Chosera 1k, then 3,5,8,k superstones and a 10k Icebear, and a Suehiro Gokumyo 20k. Now this works fine, but my question is about the Chosera 10k. Is it worth the big price ticket, and does it do any better job than what I currently use. I have seen it advertised at $235 USD so, for that money is it worth considering and will it give me anything more than what I have and does it perform as it's price tag might imply. I only look at it from the perspective of it being a chosera, and I have the 1k, which is an excellent stone, so the question of this 30mm thick stone being worthwhile or not. Opinions...