You'll eventually want to finish your MAC Pro in the (JIS) 5,000# to 8,000# range. The Arashiyama 7000# aka Takenoko 8000#, and the
Naniwa Chosera 5000#. Another stone, the Shapton Pro 5000# is also excellent, but is a very difficult stone to learn. Speaking of learning ... Learning to sharpen a knife like the MAC Pro takes awhile. Learning to polish it, is a different thing entirely....