Who to start Manning or Luck?

[Justwinbaby20]

Ok im stuck on the decision of wether to start Manning or Luck. I'm leaning toward Luck just cause the colts r goin to be playing from behind more then likely. Which means he's goin to be throwing alot. But then again Manning is out to prove he's still got it. But he's up against a steelers defense. So if someone could shine some light on it for me it would be greatly appriciated

[11stever11]

I would go with Manning. Both have tough match-ups so I prefer the veteran over the rookie.