This question has no answer, since "best" is very opinionated. Best for your buck isn't any better, since to some people 8Cr13MoV is just not adequate steel at any cost, whereas to some the value line is an unbeatable value. It also greatly depends on what you expect out of size and materials. Some people see FRN simply as another kind of plastic, while others see it as a high performance handle material.
That said, i'd have to say the ZDP Delica is an amazing value for the steel you get for the price you can get it in if you shop around and catch a deal. I got one for $50, which is insane for ZDP. On the other hand, I paid $220 for my 20CP Para 2, and i feel that was a bargain for the steel it has. It's all about what you want and expect to get for the money.