There is a lot of Happy Ribeye owners out there with four strokes
I gave up arguing the case for hp injection 2 Strokes over 4 cos nobody's gonna shell out on a new engine and say I should have bought a two stroke really!
It really is a question of what you want! Also while we are on the subject of 4 strokes what are the relevant warranties like with Suzi, Yam, Honda and Verado's. What length are they and do they cover commercial use!
On that basis it is difficult to argue against a Honda (apart from power to weight) as it comes with a five year warranty.
With commercial engines does the life expectancy matter much? Can you not depreciate them over a three year period, which covers the Opti / Etec Warranty period
Finally who makes who's engines!