I've got a 10 footer.

I've hadthe models17, 27, 35 , 40 and 48

My present motor is a 40.I like it best. The 48 weighed much more and was too bulky..I'd go with a Minn Kota Endura 40.pound thrust,it helps when that afternoon wind comes up. Whenthe motor gets worn out, save the old motor.Many of the parts are interchangeable. My 40 switch just went and my MinnKota 48 Spider switch was the same switch. Saved me 40.00