I will be purchasing my first AR and am overwhelmed at the choices. I will not be invading iran any time soon and will not be competing. It will be mostly for fun but I want a rifle that will last. I would rather spend a little more money now than regret my purchase later. I am leaning towards Colt, Ruger, or S@W. I trust these brands and think they may be the safe bet. What would you guys suggest?