I was deciding between Atlanta and Carolina for a few days. I took the Panthers because 1) less people were betting on them and 2) the Falcons could be looking ahead to Baltimore.
I think you're safe with Atlanta though, because it's coming off a loss.
I wouldn't take Seattle, as I think St. Louis will win the game.
Given all the choices you have, I'd say the Vikings is the way to go. It'll be close, but I think they'll be able to pull through.
