I dont have first hand experience with the Sabre but I run a similar sized boat (94 Eyra) and stats from other sabers Ive heard about are very similar to my boat. with a 150 fourstroke I would imagine youll see 60MPH maybe a tad better. 4 Stroke advantages, no oil, quieter, but 2 Strokes are generally faster in equal horsepower applications. I love my ProXs but I wouldnt be scared to run a 4 stroke generally reliability is also better with a 4 stroke, or supposed to be anyway.