[65Bowrider]

I'm not going to be a contrarian here, but just some info on a 115 Etec.

I have one mounted on a 19' Bowrider. When punching out of the hole, it'll keep up with a 150...but then I will soon fall behind on top speed.

WOT will do 39-40 mph, 2-3 people, half + tank of gas.
That is also without any bimini or T-top.

It primarily depends on what you want your top-end speed to be. Either one is a good choice.