Say what you want about fishing boats but some of the bass boats out there will top 100 mph.
For big lakes and the ocean those multiple big block boats are the way to go but if you want to have the fastest boat on the rivers of pittsburgh you are better off getting a small boat with a big outboard. I have seen boats in the 14-17 foot range with healthy outboards run alot better on a calm river than the guys with the fountains and bajas.
That being said I would love to own a 16 ft checkmate predictor or hydrostream if anyone knows of one for sale.