Weaponry discussion is silly- You don't want to be FIGHTING zombies, you want to be nice and safe in your home, where they can't find you until the dead people rot away and are no longer an issue.
Stockpile. Stay indoors. Stay sane. Write a book or something with all your sweet free time.
Also, if you REALLY want to go out and kill things, get a rifle for like $200 and a box o rounds for a year after the zombies start walking around and you crawl out of your hole. .223 Remington would probably be more than sufficient.