My daughter has a SuperX3 and I have a SuperX4. They are fine shotguns, throw excellent patterns to the point of aim. They are like my wife. They like to stay clean. Same can be said for the Brownings, which share the same tech on barrels and gas systems. They are very reliable. The A400 Extrema is a fine shotgun that will run a little dirtier than the Browning - Winchesters. I have one and don't shoot it very well. Nothing wrong with the gun, just doesn't fit me very well.