Saints without a doubt. LSU has been really good in our lifetimes and will without a doubt be really good many more times to come, we have a culture of winning and it's expected. My beloved Saints however have always been widely considered (by both fans and outsiders) to be "loveble losers". They have never been this good before. If LSU goes to the NC game, I'll probably attend. When the Saints go to their first Superbowl (this February?) I will be there without a doubt no matter what.
Feeling dirty if I pick one over the other. I love them both the same. I've been an LSU fan since 1958 and a Saints fan since 1967 so if I had too I guess I would use that as a barometer on who I would be more excited about. But wait a minute, you did say this season. SAINTS!
I would have to say the Saints. Reason being they have a legitimate shot at winning the Super Bowl, where as LSU has NO SHOT at even an SEC championship. Besides, LSU has two BCS titles so i'll sacrifice LSU winning another one if it means the Saints could get their first.
