My vote goes for Sigma select 1.2k
I was between the chosera and this one, they are the same in performance, as long as the steel is not too hard (the harder the steel, the better the SS 1.2k performs). But, I chose this one because, I don't want to be constantly afraid to leave the stone in water a few minutes more, and clean it right after honing as soon as I can. And always away from the sun. No hairline cracks, you can leave in in the water for years, or boil/bake it, and nothing will change. A big plus. But it absorbs water like the king stone, not exactly splash and go.