That leaves me with home defense and conceal carry. I've ruled out home defense as I have a rifle for that purpose. I will be buying a 12 gauge shotgun for home defense as well.
I think the thread starter seriously underestimated the utility of the handgun when it comes to home defense.
Yes, rifles and shotguns may be much more powerful than handguns, but rifles and shotguns are also the guns that spend the most time in the closet, the gun safe, the gun cabinet, the trophy room, ect...
Long guns are seldom close at hand when you really need a gun.
Evil can strike at any time....
When you're on the computer, eating at the kitchen table, using the bathroom, checking the mail, walking the dog, working in the garage, working in the garden, mowing the lawn, climbing a ladder to hang Christmas lights, when the doorbell rings, etc....
In most instances a long gun is just not practical to carry around the house and have on hand the instant that you might need it.
But you can have a handgun on your side or in your pocket virtually every waking moment.
The obvious choice for conceal carry are the sub compacts, but I don't think I'll like a sub compact. The short sight radius limits the range I can shoot effectively and doesn't give me much utility over my 642. Like the 642, short barrels have increased recoil which reduces my likelihood of practicing as short barreled guns aren't enjoyable to shoot.
Some sub-compacts are very accurate (even at long range), very easy to shoot (even for an extended range time), and offers twice the capacity of a 5-shot snubby....