You guys have my interest up,

I have a Benelli, not drilled or tapped, and I have little desire to D&T these guns, so what are my options for adding a sight,

Red dot or some type of that nature, no interest in a traditional scope.

I'm hearing about tru-glo, speed beads fastfires and others.

how about a quick tutorial on each, that may apply to what I'm looking for, An aiming point on a shotgun for turkeys,

with the caveat that the guns are also used occasionally for trap or sporting clays. I know, that somewhat muddys the water. The point being the sight can't be to permanent, or strictly dedicated to turkey.