The way I see the Total going is, either Warner and the Cards are able to move the ball, or Warner turns it over a bunch.
If Arizona moves it, they will score, and Pitt will have no problem keeping up.
If Warner turns it over, it will lead to Pitt scoring early, which will mean Arizona playing catch up with their big recievers.
Pitt's DB's got burned by Wayne (a big WR) back when they played Indi, and Arizona has 2 Wayne's.
I know Pitt's Defense is great, but no other team can really present the physical WR tandem that Arizona can.
I'm not saying that Pitt won't win, I just think there will be scoring on both sides.