If I were you I would keep the boat you have now. I have a 14 ft stick searing Alumiweld with 25 hp .. this boat gets cramped as soon as the Gear and Ice chest are in the Boat. My Brothers boat was 21 feet to the back of the motor with lots of room and Bro at 280 pounds could stand on the side without noticeable change in the way it sits in the water... My Stepdad had a 16 ft v hull I only was in twice.. when he would lean over the side to land a fish it would almost throw me out of the boat... He liked it but he always fished by himself. Lots of older V hull have rounded bottom the flat bottom is just more stable and has less Draft hitting fewer Stumps -- they do catch more Wind and get blowed around in the wind... Fiberglass boats are heavier sitting deeper in the water with some trailers having 4 tires that have to be replaced more often.. The only thing I see that would benefit in downsizing would be in the Boat fitting into a Garage.. If the Kids or grandkids ever ever went You have the best Boat now