Bears Packers Who to pick?

I'm leading u pick-em football contest. I only have to pick the winners of this weekend and the superbowl and I get a trip to Vegas. I'm a Bears fan, and I hate to root against my team but after all, they are the Bears. Do I go with my heart or my head? I need reasons to pick either not just because they are your favorite team. The Packers are favored by 3, Home field is worth 3 pts. What do ya think?