It all comes down to how you want to use the pontoon. I have a 2019 22 GSR, 2 tubes, Yamaha 115, Ultra Legs (aka sea legs) on a 5700 lake in MN. We put 40 hours on it for a half season and only used a tube once. 90% of the time we are just slow cruising. Top speed is low 20's which is not great. Strangely that it feels faster than my old sport-fish boat given that I feel the wind more without windshield. Would be nice to have 150, but dealer said I would need 3 tubes given weight of Ultra Legs. A tri-tune with an upgraded 150 was not worth the $ for me at this time. I am guessing a tri-tune with 150 upgrade would have cost another $10,000. At this point, I like the benefit of the Ultra Legs as I am trying to make it easy versus installing lifts.