I bought a Franchi Dominator today - 30" Trap gun. Weighs 8lbs 4oz - hardly light. As for durability, the gun I bought is 25 years old and is in near mint order as it's been well maintained by the previous owner.
I also shoot a Zoli Kronos Sport (29.5", fixed chokes) and a Zoli Sport Z-Extra (32" with extended chokes). We have a saying over here that these types of guns are "guns for life", meaning that they wear extremely well, even when you're putting 300+ shells a day though them.