Why are the Saints being favored?

So I don't understand why everyone is picking the Saints to win this game. The Saints barely made it to the superbowl by NAROWLY beating the Vikings AT HOME. If it wasn't for 5 fumbles, and an extremely bonehead play by farve, they wouldn't even be in the superbowl. Colts have been dominant in the playoffs, and will not be handing out turnovers like the Vikinigs did. I'm a Colts fan, and I'm not trying to be rude, I just don't see the Saints as the favorite. I'm saying 35-14 Colts. Just curious on your input. Don't have to hate, just honest opinions please.