This topic would probably get more response in a "shotgunning" forum, but since you are here already, let's see what you get.

I have only shot trap a couple of times, but I have shot hundreds of rounds of skeet and sporting clays. I prefer an over/under for any shotgun sport, but I have shot many rounds with my Browning A-5 and Benelli Super 90.

It sounds like you are doing fine with the gun that you already have. Unless you just want an excuse to buy a new gun (which I don't need much of an excuse myself), I would stick with what you are comfortable with.