Unsub I am a real fan of ghost ring sights on a short barrel shotty.
I've got an older Mossberg model 500, it came with the wood stock and 28 inch barrel as well as an 18 inch barrel (no sights just bead, yuck) and a pistol grip.
Pistol grip and short barrel are fun to $crew around with but for seldefense I would rather hafe the short barrel and wood stock.

I really like my marlin in 44 mag, nice and small and the 44 still is a relatively potent round.

I think my model 94 Timber in 450 marlin with 325 grain bullets would absolutely demolish anything within touching range.

The only time you can use deadly force in Canada in protection of property is if you believe your life or the life of someone else is threatened. A tacitcal shotty at your bedside would weaken your self defense case a lot more then a duck gun