[Bushwacker]

The 19 will probably be a little better, but make sure you're running the load you plan to carry most of the time. 5600 on that 17" prop will come down when you add more gas, gear and people, so you might want to hang on to that one for heavy load operation. A lot of folks do their prop testing with too light a load and end up picking a prop that's too big (too much pitch) for the load they typically carry!