Which one would you use more initially? The hunting rifle is great but if you have no optics for it, what fun is it? How long until you could get optics? Handguns are fun to have but if you don't have any in that caliber already, that means buying ammo for yet another caliber, which can be a PITA. Shotguns are fun but what's the intention for it? Home defense? If so, I'd say grab the shotgun. Seems to have the most immediate benefit for you. If it's just to "get another shotgun" and it'll sit in the safe, then I'd lean towards the .40.