I think the Saints would have had a good shot.

I don't underestimate any of the 3 other teams remaining. They all have good defenses, QB's that can manage the game, and good running games. 

If any of the teams play mistake free football, they have a shot at knocking off the Patriots. 

I for one, believe that the Jaguars are a much tougher matchup for the Patriots than the Steelers would have been.