I'm sure this has been asked before but search didnt turn anything up. I'm thinking about these three engines for my Mako 231 (currently has twin 1992 140hp Johnsons on it). How will these compare to each other? There seem to be much fewer used yamahas available and they are a lot more expensive, so leaning towards the etec or the verado. I'd like a 4-stroke for better fuel economy and reduced noise, but I have heard mixed reviews about the Verado. Any thoughts? Thanks.