I never had a good stone till I got grown and later in life than I'd like to admit. Since I make custom knives it kind of goes with the territory to have not only good ones but large ones. That means they cost more. But it does pay off. I like a family owned company in Pearcy, Arkansas (not sponsors). They sometimes have specials so don't be afraid to ask them if you get in touch with em.
Main thing is this, get two sizes of grit or, at least, get the main one that you are likely to use. If I had to get one it would be "medium/soft". When I get a burr from that, I can strop it and boy it cuts well.