This year for Christmas I finally started the process of upgrading my current set (Calphalon Katana) with some REAL knives. My present was a JCK Basic 240mm Gyuto. After some research this knife appeared on several "Good Beginner Knife" lists. So now that I have the knife, I need to start my sharpening stone collection. I think I will start with a single stone and learn the process with the one stone. I have narrowed it down to Shapton (Pro or Glass), King deluxe, or Naniwa super stone. The price difference is not much of an issue. Is there any reason to pick any of these over the others? Also, what grit should I get (1k, 1.5k, 2k)? Thanks in advance for all your help.