I have killed swans also with my 3 inch sweetheart. If you can afford the extra money, get the 3 1/2 and you will never be mad that you should of got the 3 1/2. As to this whole thing of what gun to buy. It is as hot of a debate as Ford, Chevy and Dodge. All large gunmakers are making good shotguns right now. Pick the one that feels good. You also want to make sure that enough people have shot that paticular shot gun. You don't want to be the first to try out a brand new item. Good luck.