Most of the 4 strokes are good, if you are paying extra for "acceleration" etc, I would re-think the expense based on the c-dory hull design etc. If you could buy less maintenence, or longer trouble free life, yes, but a little more acceleration is probably not going to make your C-Dory a better boat, unless you are in a bass tournement with it...., then there is the question of twin 45's or a 90... the boat is so easy to handle to begin with, but counter rotating props are pretty handy, so that is a close call, I think the issue of maintaining one motor and having a kicker to use on a dinghy or small boat would be an advantage......but a dinghy with a 45 would again be pretty impressive..ha ha