I too went through a succession of slug guns. Starting in the early 60s, I had a 12 ga Mossberg Trophy Slugster, smoothbore, followed by a Browning A5 to which I added a Browning smoothbore slug barrel. I then went to a Remington 1100 with a Hastings rifled barrel. This latter gun was quite accurate with first generation saboted slugs but I layered a piece of duck tape unto the barrel extension to tighten groups ( this was before they offered barrels with the cantelever scope base). It worked quite well.
I found the 1100 to be rather heavy so I sold it and went to an Ithaca Deerslayer II and never looked back. The gun is light, fast and will shoot most saboted slugs to 2.5 inches at 100 yards. While I could be tempted by the pricy Tarhunt or Savage's new 20 gauge bolt gun, the truth is that for the few times I now get into lands restricted to shotguns, the Ithaca is all the gun I'll ever need. My Ithaca wears a Pentax 2.5X lightseeker scope. I highly recommend a Deerslayer II if you can find one.