spoontang & Alumacraft Fisher,
I have an Alumacraft Navigator 165, so pretty much the same length as your boats but has a little wider beam. It has a 90HP Optimax. I fish Erie approx. 12-15 times a year. I feel comfortable with waves up to about 3 feet, after that the boat gets tossed about quite a bit because there's not much weight to it. The advantage of the light weight is you get great gas mileage on the lake and it is easy to tow. Have fun and good luck fishing this year.
TheBigE22