Long time follower but here finally some input also..
Have Seascape 18 with 5 summers experience. Have 4hp Yamaha and that is lot of power for this boat. Had to change to lower pitch propeller from standard and still with very light throttle boat reaches very quickly 6 knots.
Issue is that even with lower pitch propeller I end up throthling when coming to pier - not very convenient but managable.
I have been thinking about switching to Torqeedo as range hasn’t really been issue in current use. With extra battery I believe I would get performance I need, but investment is high for very little use..