get an 18 footer with the 115 and be happy, also get the power pump with a 4 blade impellar, i owned a 16 foot duckworth with a 90 yamaha, i guarentee you wont be happy, at the very least get an 18 with the 90 and the powerpump jet unit. or just go ride in one like you ordered with a kicker and all the gear in it and see for yourself