Either boat is a good purchase. Each has its pluses and minus. One thing that I saw in your original posting however struck me; The weight difference between a P-16 and a Hobie 16 is no issue so don't expect better performance based on that. The fuller volume of the Prindle will give you somewhat better handling in certain conditions however taking 5 adults out on a P-16 is going to be a bit much ion any event.

Sheldon
P-18