My best suggestion is to demo an Outback.....consider the Outback is 5" narrower and 1 foot shorter, but the capacity is only 50 pounds less than the Jackson.
I know you will fit, but would you be comfortable??.....the demo will answer the question.
I went from an Outback after 3 years to a PA-14....mind you I am 5'11" and 170.....the room increase in the PA-14 is worth it to me as I downrig troll, typically for 7 to 9 miles over 4 to 5 hours and enjoy the ride. The extra room inside the hull allows for many more options of tackle on the deck and other stuff too.
My old Outback, a 2010 version, had the original seat...that would kill my tush.....the 2013 PA-14 had the new Vantage seat.....as does the new Outbacks......and the comfort is terrific.
So, try before you buy