I don't know where Manning is goinf just like everybody else, or if he'll even play again. Although, I would bet he will play.
I just don't see him going to the Ravens. They will pony up the money for Flacco. He has solidified himself there. The only thing that would cause him to leave is if he just demanded way too much money, which I doubt. Manning might be too expensive for them anyways, considering their cap situation and how many players they have to sign.
Miami, New York and Washington seem to be the most likely landing spots, with Miami and NY making more sense since they are closer to a complete team. Washington is a perennial mess and Manning only has so many years to make it to the Superbowl again.