As much as I hate to say it, I think they Jets are a decent bet at 25-1. They had an off year last year (mainly because of dirty sanchez) but they are a good team that has made it deep into the playoffs multiple times over the past few years. They could be one of the AFC teams to bounce back.
I wouldn't bet on them. In 2009 and 2010 when they made it to the playoffs, they had a defense that was arguably the best in the league. Their defense was still ranked pretty high last season, but they were not as intimidating as the 2 years before. They don't have any good pass rushers, so they rely on their secondary which at least is one of the best. They just signed safety LaRon Landry to add to their secondary, but he is coming off a season in which he played a total of 8 games due to several injuries, one of which was to his Achilles tendon which made him end the season on IR.
Who knows what is going to happen with their offense next year, I don't even think that Rex Ryan & Tony Sparano know. Their locker room is not looking any better than it did at the end of last season now since some players are openly against the acquisition of Tebow. The team doesn't seem to buy into what the coaching staff is doing, so I can't see them going far if they themselves don't believe that they can.