RE: SCOPE QUESTION FOR SHOTGUN!!!
While I never actually used a Red Dot optical device, from what I have heard and read, the Aimpoint is one of the best of the bunch. Stands up to the recoil and is a quality unit. One thing though is that they aren't cheap!!!
Being more familar with scopes, that is what I have on my turkey gun, mainly because my gun shot high left with open sights. I'd love to use some fiber optic sites, but I don't think I'd be able to adjust them enough to compensate for my gun with out the sights looking awkwardly off center.