All that matters is what you like. If you like a 24'' barrel, Then shoot it. A longer barrel will give you a longer sight plane and better "swing" but that is about it. In a shorter barrel you will hardly lose any velocity and barely see a differance in the way your gun patterns. I shoot turkeys with a 24'' barrel, upland and dove with a 26'', and waterfowl with a 28". Like I say, whatever you like.
Novaking