In my opinion, all the "tacticle" stuff isnt necessary.
Not just unnecessary, but taken to the extreme it can take a perfectly decent gun and just make it feel flimsy and cheap. I've seen enough folding "tactical" stocks and forearms (along with thing, flimsily attached heat shields) tacked onto a perfectly good shotgun as to make it feel like a toy. They in no way held a candle to the stability and quality of the original furniture the gun wore. A number of the "extended magazine tubes", particularly the higher capacity ones, also leave a lot to be desired. I'm sure all this stuff COULD be made at a high enough quality to be useful, but not at the cheapo price point that companies like ATI throw their stuff out at, nor in the "one-size-fits-all" implementations that they try to sell us on. In general, with the exception of something like a flashlight like what you mentioned, your average plain-jane hunting shotgun will work just fine.
And I'd certainly agree hat for home defense, a shotgun is probably the way to go. Easier to aim at 3am in the morning when you're still foggy from being woken up in the middle of the night, the pellets loose momentum faster (meaning fewer worries about hitting other people behind a wall), and at close range a lot more stopping power.
IMHO a pistol comes onto it's own as a personal protection weapon once you LEAVE your house. I'm not too familiar with revolvers as I just don't shoot them much, but as a replacement carry gun I've been looking at the Ruger LCP. I've had my permit for a while but all of my CURRENT handguns are full to mid size, which I just don't feel comfortable carrying.