Go with a rudder
My only advice here would be to go with the rudder - no matter which boat you choose.
The rudder does allow you to manage your drifts a bit better and after a long day of paddling and fishing it really does help to keep you from getting blown around.
Then again I am biased because of my float tubing days. When tubing you have your feet to help you position yourself in the right direction when fishing. A rudder gives you just a touch of the same control.