Well, there're no mountains in a duck marsh, well, not in Texas anyway. But, do really like autos and my next shotgun will perhaps be a Mossberg 930 or 935. They soak up recoil without having to be heavy. I'm in no real rush for another gun, though. The 500 shoulders and shoots great. I wouldn't wanna tear it too far down standing knee deep in water,. I can always carry a spare to leave in the van. LOL But, I've never had to do anything like that. Only reason I would look at that Ruger stainless gun is because of the environment down here. Stainless is neat. Remington, Mossberg, or somebody should come out with an all stainless gun. My ideal would be stainless and camo finished auto with a tang safety, the camo to keep the shine down. I don't really know why no one has worked with stainless other than perhaps shotgunners are a little more traditional and less open to change than rifle or handgun shooters. The market for salt marsh and bay waterfowl guns is probably not that large, either. Anyway, like I say, the camo is pretty rugged. I've had that gun about 20 seasons now and it's a little scratched up, but not rusty.
I don't just have one gun. I mean, if I wanna go quail hunting, I'll take one of my side by sides, probably the little 20 gauge. Talk about a light, quick handling shotgun! Every job has it's best tool.