New boat/ what motor?

I am looking at picking up ~18 ft jon/modified jon by next spring, might end up being the Sea Ark 1860 river cat. . I am thinking about a 90hp Yamaha 4 stroke for it. I am mostly sold on the idea of a 4 stroke for the quiet running and fuel economy. I live on the Ohio river and want to be able to get as much distance as possible out of my fuel tank. So, if you were to purchase a brand new 4 stroke in ~90hp or so, what engine would you buy and why?

Thanks!!