For me, if I did a sight, it would have to be a low profile deal. I can't stand not havin a good cheek weld with full power 12 ga recoil.
I can't think of a need personally for a rifled choke. I haven't used one and don't know of the benefits.
Hmmmm... I think if I were doin it right now, id look into a low profile red dot or if I wanted magnification, I. Would consider somethin like the variable power, (1.25 - 4 power) scopes. That would really bring 50 to 75 yard shots in close, or back it off for closer targets.
You mention it bein primarily and HD firearm though, in which case a variable power scope wouldn't serve you well. A red dot may be the way to go, like the SightMark. For HD ranges, I don't see a ton of benefit from a rifled choke. Improved or modified maybe?