This game is really hard to pick, IMO. The Bears offense doesn't have the fire power to stay with Indy "IF" they are clicking on offense. Turnovers are going to be what decides this game. If Indy stays away from turning the ball over, they blow the Bears out. The Bears D is very good at forcing turnovers though, so you have to figure they're going to get at least one or two.
I'm torn, but I say Indy wins this. I just can't see a team with Grossman as their QB winning a SB. I dunno, maybe he's Trent Dilfer all over again though...