Here we go, and boy did you open a can of worms on this one without even knowing it!
You need to narrow things down a bit. Do you want something to go to the range and shoot (ie. targets with)? Do you want a home defense weapon? Do you want to be able to carry/conceal? Honestly, those are such different requirements...you need to think about more than one piece. For home defense, shotgun. No question, no debate. Anyone who argues with this has no clue. 12 guage would be good, 10 is better. I use a Benelli Supernova Tactical :http://www.benelliusa.com/shotguns/b...a-tactical.php
with pistol grip. 18" barrel is easy to maneuver around in close quarters, but they are now making a 14" that would be even better. 3.5 inch shells in a deer slug will go through a fridge, or anything else the idiot hides behind. No where to run, no where to hide. Load it buck shot, deer slug, buck shot, deer slug all the way down, and get the magazine extension that will give you one in the pipe, seven in the mag. Buck shot sends them for cover, deer slug finishes the job. Home defense, done. Can be had for around 4 bills, and can change barrels to longer versions for skeet, birdhunting, rifled hunting, etc. Read a nice review here: http://www.shootingillustrated.com/i...lli-supernova/
. Shotguns are the bomb for home defense. Not only that, name me a sound that will make your insides turn to water faster than the sound of a pump shotgun chambering a round if you are doing no good. Unmistakable. The Corps is using the Benelli M4 semiauto for urban fighting, and they love it. Good enough for me. My wife has a 1966 Ithica 16 gauge Featherlight (awesome trap gun) on her side of the bed that was my Mother's and we have an attack plan that will keep me from being hit by her line of fire. Woe be it to the poor bastard who chooses our place for a hit.