I had looked at a 30k but just could not see spending that much $$, all I have is a C1K, 4-8K GS and a couple JNATS and a coti but then I scored a used NN 12K for a great price ( seller even tossed in a NN 1K that I have no use for ) so now my progression is 4,8, 12IK then JNAT with a hint of slurry and strop and edges are good for me. I have been tempted to cough up the coin for a G20 though.