I'd have to go with two over one. Like Hunter said, spare parts, two times the firepower in a SHTF scenario.
But also because...I'm just not that good with a rifle. I mean, I don't completely suck, but I don't think i'm good enough to outshoot my entry level AR. It's an ATI Mil Sport (aluminum receiver, not polymer), and it's pretty darn accurate. I've got a red dot on it, so I'm not looking to reach out 300 yards with it. With a decent scope, I think it would do very well. In short, two of those would be better for me than one really nice AR.
But also because...I'm just not that good with a rifle. I mean, I don't completely suck, but I don't think i'm good enough to outshoot my entry level AR. It's an ATI Mil Sport (aluminum receiver, not polymer), and it's pretty darn accurate. I've got a red dot on it, so I'm not looking to reach out 300 yards with it. With a decent scope, I think it would do very well. In short, two of those would be better for me than one really nice AR.