Which do y'all recommend? I'm shooting adj. f/o sights, but my eyes aren't the best and I'm havin a lil trouble. I have about a $150 budget, but I'd like to have something that's durable. I'm shooting an 870 sm w/ 23" tube and sureshot stock, and I'm concerned about the optic standing up to some pretty stout recoil. The gun is tapped w/a rail on it. So I wouldn't have to spend any of the budget on that. I had a pro diamond scope on it, but it wouldn't hold zero. Thnx for any experienced info y'all.