I'm looking for some opinions on a choice of rifle. I've decided it would be wise to own a centerfire long gun. This rifle will be my only centerfire rifle. It needs to be an all-rounder. Primarily, this will be a SHTF scenario long gun. Otherwise, this gun will be for fun/plinking. Ruggedness, ease of of maintenance (or lack thereof), simplicity, accuracy, ammo availability, etc. are the primary requirements. I'd also like it to be relatively inexpensive ($300-$400), but that's not written in stone. Any ideas?