Question of the Day: Shotgun or Rifle for Home Defense?

Over at the highly testicular gunnuts.net Caleb reckons rifles are the way to go for home defense. He makes his case by pitting shotguns against rifles in four categories: Cost, Firepower, Shootability and Ease of Use. After giving the shotgun cost kudos, Caleb proclaims “this post isn’t about home defense on a budget.” OK, then. And while we’re at it, I’d rather have nine rounds of Conversation Stopper than 30 rounds of Are We Done Yet? If cost isn’t an object, why not both? My Benelli and SCAR are BFFs. But if I had to chose, it’s Big Ben for the win. Which long gun do you prefer for home (as in in the home) defense?