I would choose a good 45. loaded with hornady TAP HP.Because a shotgun can be difficult to move with in tight quarters and shooting off a 12G indoors
will make your ears hate you.
I wouldn't mount a light on my handgun.Think about it...if the mook sneaking into your home sneaks in with a gun and you come around the corner with a
1911 with a surefire X200 mounted on it,whats the first thing the mook is gonna shoot at?Answer-the light.And whats behind the light?Answer-YOU!
Instead,hold the light in your off hand and away from your body.Or if your
rich you could buy some NVG's.And remember to keep the light off untill you see a silouette.You don't want the mook to see the light shining down the hall
giving him a chance to load that pistol and lie in wait...
If you got a wife and kids then I belive you should leave the wife with a shotgun in the bedroom and have her call the police while you man up,grab
your weapon of choice and swiftly but cautiously make your way the kids
rooms,and stay with them!Don't risk taking them back through the house
to the bedroom with a dangerous and possibly armed home invader plundering
about...your wife/GF will be just fine with that shotty pointed at the door.
If your alone then you should wait in the bedroom,call the police,and have your weapon pointed at the bedroom door while the mook does his thing.
That's a "safe" way.But im sure no one here would sit idly by and let their
home get violated.I know I wouldn't.I'd go after the bastard.
Im personaly against rifles being used as home defense weapons.Unless it's
like an M4 using frangible ammo.
Don't worry about the fatiuge of just waking up.The sound of a door being kicked in or a window shattering will wake you up good and proper.Your
adrenaline will kick and getting ungroggy and battle ready won't be as hard you may think.
If you've practiced your home invasion drills,taught your family how to act,
and have a good weapon by your side,your chances of survivability are very high.