Big fan of protecting oneself here (and trained in house clearing, tactical defensive firing etc). I will never sell any of my guns. I've had many friends who are LEOs over the years (heck I almost became HPD back when I moved to Hawaii, 15 years ago myself - I respect our police and military; they're our unsung heroes). Thankfully here in Colorado one can get a ccw.
Good points re danger from rounds through walls, that's why a tactical Remington 870 with smaller (yet still lethal to BGs) shot that can go through BGs but not walls, is what I use in an urban environment.
http://www.combathunting.com/REMINGTON_870-REMINGTON_870_PISTOL_GRIP_FOREND_FRONT_STOCK_ATI.html
http://www.combatstocks.com/Choate_Remington_870_Top_Folder.cfm
(note: I think flat black is a better finish for firearms, as chrome can reflect light and give away your position to BGs).
My favorite weapon is my Sig 226 9mm (used by Navy Seals, Texas Rangers etc). Wonderful firearm. I can get a 3" group w/rapid fire at 50ft. Works great. Also have a smaller Sig 9mm and a Glock .40 cal (though it's not as accurate, it has better stopping power than a 9mm). The Sig 226 is truly great (superb handling, shot control, accuracy etc):
http://www.sigsauer.com/Products/ShowCatalogProductDetails.aspx?categoryid=7&productid=90 I've shot dozens of firearms over the last 20+ years; this is by far my favorite, by a wide margin.
Key is being properly trained and familiar with how to handle one's weapon (eg in low-light situations, defensive firing etc) during times of a crisis, eg the BG is in the house, you call 911, hole up, and then what? There's a BIG difference between merely having gun(s) and being able to *use them correctly* in home-defense situations (both from a safety of family members standpoint, as well as a defensive one). There's some good videos and tactical shooting schools out there, which I like. Safety first. Problem with most people w/guns at home is that they aren't fully/properly trained, and make errors. Kind of like traders lol.
I couldn't imagine not having my arsenal available to protect myself in case thugs try and kick down the door. Talk about risk management. Here in Colorado Springs we have half the national average for violent crime (and we have ccws here):
http://www.springsgov.com/Page.asp?NavID=4311 In areas where criminals know there's a good chance that their intended victim may be carrying lethal force, it seems there's a much lower crime rate (including burglaries, as well as p2p). Common sense.
-k
(bg = bad guy, LEO = law enforcement officer)