A SxS is pretty much out for a trap gun. There are many good choices out there for O/U's as well as semi-autos. Many top notch shooters are going to semi's for competition. After sometimes 300 shots + in a day fatigue is less with a semi gun than others. I shoot a pump M12 Trap, have had O/U's and Unsingles as well.
http://www.jaquas.com/gunlist/Search.asp
Go here to look up trap guns and prices.