I'm not a Glock fanboy by any stretch but they're reliable weapons. I own one, but it rarely leaves the safe. Personally I prefer 45's for home defense and 9mm for conceal carry. I'm currently carrying a S&W M&P 9 and a Springfield XD subcompact 9mm. As far as shotguns, I only own one for home defense. Remington 870 hands down is as good as they get. They work no matter what you throw at them. I have a couple of Benelli shotguns if you're interested in spending some coin they're nice guns but if I'm reaching for something to protect my home, its the 870. Also for handguns, I'm a Kimber fan myself, but they're pricey. I own too many of them but they're my favorite weapon as far as reliability and accuracy. I started with Kimbers when I used to shoot competition and I've never had love for anything like them. Now to be fair, I don't consider them a utility weapon like my 2 CC weapons, they're more a luxury.
Someone mentioned laser sights and flashlights. I'm not a fan, especially for home defense. All that does is tell an intruder where you are. You know you're home layout better than him. Shelter, and prepare to defend. If you need a laser or a flashlight to hit a target you've not handled the weapon enough. I take my kids and wife to the range regularly so that not only are the familiar with the weapons but so that I can teach them proper safety. We have a healthy respect for firearms in my home.