Going to be honest with you, friend.
I am a total Cowboys fan. Born and raised in the DFW area, I've breathed them since I was little. Behind the 'Boys are the Dolphins and the Ravens. I have loved these ball clubs since as long as I know, but here's the bad news.
I don't believe in Flacco. He's got a rocket arm and a deep threat with Torrey Smith, but he's not a Fantasy winner. I really hope he proves me wrong, because I love watching them play.
That being said, love Beast Mode and Foster. Great RB's.
Roddy will keep you happy, Lloyd will melt faces (in my opinion), and Decker has developed a unique rapport with Manning that will pay off.
Gren Olsen is sub-par, but not a player you should think will hinder your team.
As for your bench, boy oh boy did you get some gems. Tate AND Toby?? Good for you. Very solid and potentially amazing back ups, if the number 1 goes down.
Love Torrey Smith. He will do great things this year.
Hope my opinions helped out.