I would not go with an oil stone at all, and here is why. My whole life I have been using oil stones, as my father taught me. So, as I got older and made more money, I purchased the best arkansas stones money could buy. I even had a custom stone made. As I was researching oil stones, I came across information about water stones and japanese tradtional knives. (
www.korin.com, chefsknivestogo, etc).
I took a chance and about 5 years ago I got a norton water stone - primarily to sharpen my fillet knives. Since then I have used my water stones. I got videos on sharpening, spoke to the knife master at Korin (Purchased a bunch of knives there too!) - let me tell you that sharp does not describe it. These knives sharpened with a water stone were so sharp my razor felt dull.
I now have norton stones in 220, 1000, 4000, and 8000 grit, and a japanese 10,000 grit water stone (synthetic), stone fixer etc. I can make a dull knife a razor with a mirror polish in about 10-12 minutes. I am not kidding. Check out korin on youtube they have a whole tutorial.
The point is that tonight, I was lazy, had a couple new knives and pulled out the translucent ark stone. It is a top quality stone - highest grade.
NOTHING COMPARED TO THE NORTON! The thing felt uneven, could not put the same mirror, I could get a burr but it was harder to get to and it just is not as good a stone.
My $0.02: go with a water stone, never look back. BTW: strop with a stack of newspaper, that is what the knife master at Korin taught me and it is better than any piece of leather!