What kind of water to you plan on fishing?
You might want to go to Jackson kayak site then products -> Fishing kayaks.
This will bring up a page,
Jackson Fishing Kayaks, comparing their fishing kayaks.
Shows length, widdth, weight, capacity and grades for water types and characteristics like speed, manuverability, standability, tracking.
You can click on ones of interest to see more about them.
You can demo the Jackson kayaks at Mountain Sports in Arlington which has other brands as well or through Kayak Instruction Inc at Paddle Point Park on Lake Ray Hubbard where you can also do rentals.
Have you checked out the coosa hd, cuda hd and mayfly?
I have the Jackson coosa hd and love it. Very stable, lots of room and track. I can not say enough about the seat, I fish 6 -7 hours in it with no back pain. For its size and width speedy and maneuvers pretty good.
Adjustable seat helps with manuverability and wind.
You can't go wrong with a Jackson.