I would ride the bikes yourself. You may find you do not like one over the other for various reasons, and one of the reasons may or may not be the type of drive. I prefer a chain driven bike myself. I have ridden several different shaft and belted bikes. My least favorite type is the shaft due to the (not sure if this is the correct term) "shaft torque" where you can feel the power in the shaft drive which to me feels strange. Some people I know actually like that, but to me it feels off-balance. But I don't know if I wold rule something out due to the type of drive without knowing what it feels like "to you" first hand.