within a year there will be many 4 strokes on the markit because of emissions regs.most of the guys on this site are high performance types and will say mercury.my parents are retired but young and go on exotic vacations.my dad says he sees mostly yamaha engines.the twin honda set up will probably be very reliable but slower than a big single engine because of weight.another plus of 4 stroke is not having to buy oil all of the time.best to go down to the marina when and ask a guy that has a rig like you want if he likes it.if you troll while you fish you might do good just running 1 engine at a time.or ask the mechanics in the shops or take one out to a good lunch.i am a tech at a ford dealer-i know the inside story on ford.if you get to know a marine engine tech you will get informed.