While I will always love the look of nicely polished blued steel in a quality walnut stock, for a hunting rifle, I'll take stainless / synthetic. Anyone who's done much hunting knows there's always going to be that unexpected rain shower, or snow squall that will have water running between the barrel of your rifle and the stock. Makes me nervous with a blued steel rifle, while its no big deal when the steel is stainless, and the stock synthetic.
I had a day a few years ago, in deep winter when the iced over creek I was attempting to cross didn't hold up so well. I went chest deep in the water under the ice before I hit bottom. I slammed my stainless synthetic Remington 700 on the ice and used it to spread my weight as I pushed off the bottom as hard as I could to get myself back up on the ice. As I came out of the water the water came out of the hole and completely engulfed my rifle. Once I managed to crawl off the ice to dry land, I opened the bolt, dropped the floorplate, shook the water out of the rifle, then reloaded and did a stand on the way back to the truck. When I got to the house I took the barreled action out of the stock and let them dry over the baseboard heater in my family room. When things like this happen, stainless / synthetic is a great thing.
Did I tell you about the time I got caught in a thunderstorm that dropped 3 inches of rain while turkey hunting with a blued steel Remington 870? I never did get all the little rusted parts out of the action of that shotgun.