I have a few reasons for choosing the Giants. They are the only one of the 4 used to playing outdoors and in the cold. They won at Lambeau in the playoffs a few years ago in the frigid, frigid cold and this time around shouldn't be quite as bad. The last time they lost 38-35 at home vs. that year's regular season juggernaut, we all know what happened in the re-match in the playoffs.
Also, they have the explosive pass rush and passing game to make Rodgers uncomfortable and keep up in a shootout.