I am hesitantly feeling like this is one the Bengals should win. I think the Dline is the one place that they had the depth to withstand injuries that will inevitably come, so I don't think there is any need to significantly downgrade the D.
The Bears are dinged up too, hopefully this will be the day that the O takes some of the pressure off the D to have to play nearly flawless to win. Cutler's game has never done much for me. Devin Hester worries me the most, esp. considering how the all purpose back from Houston carved us, sliced us, and diced us. That will be a key to the game.
But, all things considered, I think the Bengals will finally put together a solid game on both sides of the ball and win by 10-14 points. Crazy considering the close nature of the games, but the same gut that was expecting the actual result last week is feeling pretty good about this one.