Have any of you guys ever shot a 12 ga shotgun indoors without hearing protection?
All this talk of you've got to point and identify is good because most of the time you ask people about shotguns for HD they're all "Meh, as long as I am pointing it in their direction they're dead."
My .45 ACP will serve me fine should I ever need it and not deafen myself and my family in the process.
To be more constructive and answer your question I would add a light, nothing more.
People recommending slings how big are your homes? How far do you think you will have to carry your HD dedicated Shotgun before your adrenaline from someone being in your home dies off and you think "Damn this thing is heavy, let me throw it over my shoulder until I get closer to where I think they are." You don't work at a border checkpoint and need to lug it around for 10 hours. That gun is going to be in your hands, hot, safety off in a ready position the entire time you are sweeping the home, be realistic. Sling is useless and likely to get snagged on something, lose it.
People recommending saddles for more shells, again, how big are your homes? How many different neighbor hood gangs do you expect to be attacking you at once? Even if there were a half dozen intruders in your home after you've shot one or two of them you really think the other 4 will not be running the hell out of there? Try defending shooting people in the back in court and let me know how that goes for you.
An overwhelming majority of home invasions are one or two people, no more. The criminals that need to be shot multiple times due to being hopped up on drugs are almost always alone. 5 guys don't get high together and break into homes. Its one junkie looking for money for more drugs. What I am getting at is the need for more shells than a standard tube mag is almost non-existent. If you really want piece of mind get the extended tube but the shell carrier is just adding weight to what you are holding.
This is what I would have+light.