As a Broncos fan, I can tell the Bears fans they should be cheering for Rex Grossman tomorrow. Believe me, you don't want to see Brian Griese starting next season. Ugh.
So far in the playoffs, both Peyton and Rex have thrown two touchdowns, but while Rex has one interception, Peyton has thrown six. Not to say that it's a walk for the Bears, but I think if their defense can play well, they'll have a chance.