Samurai, I have a slightly different take on the subject. If you are hunting with more than just yourself then canoes can be dangerous. There is not much room to swing around, you are generally in clumsy clothing, you probably have decoys, not to mention a couple of loaded firearms.
If you are going to do it, I agree with JJ McGuire that the Radison is the one to do it with. It is almost a misnomer to call it a canoe it is so short and fat, but that is what makes it stable. However with your weight limit concerns, even that is questionable.
I have been designing boats for a number of years (including duck boats) and there are a lot of great designs out there for what you want to do, both powered and unpowered. If you are handy at all and have a couple of spare weekends, you can build exactly what you want for 500 bucks or so.
Good luck with the quest.
In every thing you do, enjoy the journey !