If anyone does break in, chances are strongest that you'll be responding with a handgun, just because that's the first thing you're likely to get to. Hunker down in a bedroom waiting for either the cops to show up or the intruder to come through the door? I'd probably want a shotgun for that, or an AR. Either would be good for that particular role. Can't go wrong with a 9mm Glock, M&P, or xD (whichever size does it for you in all of those). I use a SIG P229 in .40, which is good since muzzle-flip is reduced in the heavier frame of that gun. For the HD shotgun I have a Mossberg 500A Persuader (black plastic furniture, 18.5" barrel), and I don't feel the need to get any other shotgun for that purpose. I have a Spikes AR with an Aimpoint and USGI BUIS for the HD AR. Again, it's solid and I wouldn't need anything else for its role either. Bottom line though, whatever you use, make sure it's something you can hit the target with. Anything you're no good with is a terrible choice, no matter how good its specs are.