28" or 26"? Balance (re: weight) is the main consideration in answer to this question. My turkey buster has a 24" barrel. Great for turks, but lousy for wingshooting; my 28" barreled gun is more versatile overall. I've busted turks, geese, ducks, and doves with it. I suspect my experiences are similar to many others with tons more experience.

If you're only gonna have one gun, then go with a 26", and get the versatility. I hunted once with an old borrowed 32" A-5. That was way too long!