RE: Buying a new slug gun...advice??
I love my H&R Ultra Deluxe in 20ga. single shot(they make it in 12ga as well) topped off with a Leupold VX-II in 3-9x40, I'm using Hornady SST slugs, this shotgun is a tack driver!!!!!
You did mention you may do drives, with that said then you may want a repeater, look into either the Mossberg 500 or the Remington 870 both are pumps, and look at the ones with the rifled/cantilever rail barrel, and place a decent scope on it