Talk about your reasons why
Well let me start off by saying this - I didn't mean to come across like I WOULD be concerned, but I do feel like they would offer us the biggest challenge. Truly, I think it's becoming more obvious each week that Alabama's biggest opponent is ourselves...we're easily the best team as long as we keep our mind's right. So to answer your question I guess I'll discuss each team, and what kind of challenges they might present to us if we were to play them.
Notre Dame - Plain and simple...they would worry me the least. They're pretty physical up front on defense. I haven't looked at the measurables for their defensive line, but I know they're big. And Te'o is a pretty darn good player as well. I just don't think their athletic abilities as a team comes anywhere near what we have...and that includes their big boys up front.
Kansas State - I think they offer up a pretty good challenge, and I'll admit, I don't know as much about this team. I think Klein would offer up a good challenge for our defense, but after him they don't really have much to offer up that scares me...I think this would be a pretty easy win as well.
Oregon - They're unlike any team that we've faced or will face. Their RB's are fast as hell. And their defense is a little bit more physical than they get credit for. Mariotta is a stud, no doubt, BUT, he is a Freshman. Also, I think as the game wore on we would end up manhandling their offensive line.
SO, I wouldn't be concerned necessarily, but I do think that out of the 3 teams presented here, they would offer up the biggest challenge with their overall team speed.
All this and the team that I would most enjoy playing in the National Championship would EASILY be Notre Dame. I wasn't alive the last time we played Notre Dame in the National Championship, and would love to see it.