I've owned both and I would go back to the pontoon in a minute before the deck. I would also go used with a few cracks and scratches as long as the motor was solid. You will enjoy the used toon because you won't be worrying about scratching or denting a new boat. Rigged with enough horsepower the toon will do everything the deck can do, perhaps you won't get there as fast but who cares. Have you priced both yet? New deck will cost significantly more than the toon.