What FA QB should I start this week?

Detroit is the #29 p D (249 yd/game; 8 TDs) and the #30 rushing D (180 yd/game; 7 TDs). I think if any week is the one to put Frerotte in, this is it. Although Minnesota has given up a lot of ping yards, they've only given up three TDs through the air so far, and Kitna's turnovers combined with Minnesota's ability to create turnovers just makes it look like another very long day for the Lions. Pennington and Schaub should both do okay, but don't quite have the matchups that Frerotte does. Russell isn't ready yet compared to the other choices.