I've bought Benelli, Ruger, Springfield, Mossberg, and S&W. Springfield is the only one that did not come in a cardboard box (but rather a nice plastic case), that came with TWO extra magazines instead of one extra (okay, the shotguns and revolver didn't come with spares, but the Ruger LCP only had one spare), and it is the only one that included extras beyond a couple ergo options and a lock (specifically, paddle holster, mag holster, and mag loader).
So, from my experience, I have to say Springfield Armory has the best package.