I think GB is a risky option. Personally I would stick with DET.
GB is sexy cuz of the 7 sacks and 4 picks last week and the return TD in week one but I think that the monday game will be a lot more high scoring than people are predicting. The GB offense WILL get goign eventually, and when that happens, the Defense is in for a very poor fantasy day.
Some completely made up numbers to consider:
DET: odds of getting negative points: 5%
odds of getting 0-5 points: 5%
odds of getting 5-10 points: 80%
odds of getting 10+ points: 10%
GB:odds of getting negative points: 20%
odds of getting 0-5 points: 25%
odds of getting 5-10 points: 35%
odds of getting 10+ points: 20%
sure GB def could go off like they do sometimes and rack up close to 20 but id stick with the sure bet and see DET punish CJ and pick off (insert TEN QB here) a couple times while not giving up too many points.
I was considering the GB Def as well but its too risky esp against an unknown SEA team.
take a peak at my thread, tell me what you think I should do with my RB2 and flex spots this week:http://www.fantasyfootballcafe.com/forums/viewtopic.php?f=19&t=521962&p=3467636#p3467636