I'm currently hunting deer in New England with an 870 Synthetic Super Slug with a Cantilever barrel. They don't offer this model in an 870 anymore, but the
Sportsman 11-87 is the equivalent in the autoloader.
I've got a Bushnell Trophy Red dot that I purchased from
Cabelas and it works very well. While I also own a EOTech for my AR, I don't think you have to spend that much money on a hunting shotgun. Yes, I use my AR, but my 870/Bushnell combo gets a lot more beat up so I wanted a cheaper scope in case I drop it from a tree stand, etc.
Quick tip with any red dot is to sight it in every time you drop the gun. I missed a good buck last year after breaking through some ice and knocking the gun pretty hard against some ice. The electronics are somewhat sensitive and I learned this the hard way.
Finally, I'm sure someone could nickel-plate your gun but why? You wouldn't want to nickel plate a hunting weapon and if you really wanted one you could buy a
Remington Marine