Packers winning by 7 seems very reasonable here....
Stafford will make his fair share of dangerous passes and turnovers and the opportune Packers offense will be a pillar of consistency.
Packers are just a class higher than the Lions. (The Lions are 1-3 against the top teams on their schedule so far), and the Packers have beaten the Saints, Bears and Falcons all by atleast 8)