I think they match up VERY well against they Bears this year.

They match up terribly with the Bears. They have a bad offensive line (According to Footballoutsiders, 32nd in the NFL for rushing, and 28th in pass protection in 2006). They can't run the ball. They also can't put pressure on the QB and have a porus secondary (30th against pass according to DVOA in 2006, and now without Bly).
Rex is typically terrible against teams with a good pass defense and torches teams with bad pass defenses and when he has time. The Bears D-Line will run through the Lions offensive line like it isn't even there.
This is a horrible horrible matchup for the Lions.
The Lions have absolutely no shot at sweeping the season series agaist the Bears and have about a 1% chance of winning 10 games
Link.