I think if you are going to be fishing out of it go no rudder, less to hang up on.
I don't know much about the new Pungos but the old one has a skeg keel which helps it track well. From your experience in the canoe you know how to use the paddle as a rudder, same deal in the yak.
Don't overlook the importance of a good paddle.
I've got some gear from Billington sea that they gave in barter for advertising. I'll get it up on auction here. Pumps, straps and cushy seats.