I have a 16" .308 M1A by the bed -- I wouldn't go to the door at night anyway unless it were an exceptional situation, but for barricaded defense, something which is armor and barrier blind is a better choice than a handgun. A handgun is great for moving around your house, concealing, etc., but handguns and handgun rounds suck otherwise. And a .223 rifle (or pistol caliber carbine or a light 12ga or 20ga semiauto shotgun) is easier for less-trained less-strong people to shoot than most handguns.)

(I also wouldn't put my life behind a Kel-Tec if I could avoid it, which is a better argument against the 2000. That's the firearm equivalent of running your website on a secondhand overclocked pentium 4 box. I own some of them and am fine with them on the range but can afford better and do.)