I' ve never used a scoped shotgun, but I can understand the advantages to a low powered scope. I' ve considered a red-dot type, but I' ve heard of problems with malfunctioning (batteries, etc), so I' m a little wary of those.
I like the fiber optic sights like the Tru-Glo, etc. Just a matter of how much $$ you want to spend and what style suits you. I' m trying the AllenTurkey Taker this year (similar to the Tru-Glo " True-Point" ).
I remember a couple of years ago I saw an ad for a sighting system (like a " heads-up" design) called Trijecon or something like that. It used tritium so it needed no batteries. But it was over $200! Ouch! [

]