Since you have a heavier kayak in the PA 12. Would be nice to have a lighter option for more difficult launch locations and speed, like the Revolution 11, for yourself when your son is not around. Question is, would that kayak be sufficient for your son? I would say yes, but need to try it out against the Outback.
The Revolution 11 is the kayak I'll be getting for fresh water lakes here in Minnesota. Easy and light to transport for those difficult launch locations. Otherwise I would stick to a normal boat and motor or a PA. Of course the out front Ocean is a whole different animal and as you can see I prefer different Hobies for that task.
Another option I considered was a tandem (Oasis) for my father and I. Would be a nice option also to consider for a second/third kayak. Guess you have to consider your launch locations, their access, transportation and frequency of use as one or two fishermen.
But now you would have a heavier kayak again with bigger storage space needed. Choices, choices, nice to have.
For some Hobie comparisons, check out Josh Holmes reviews, I think he nails it here.http://modernkayakfishing.com/articles/ ... yers-guide