QB & WR Help...if I win I am in the finals!

[crazymike0907]

in the 2nd round of my playoffs I'm facing the guy who went 12-1 through the regular season, and his one loss was to me . So I wanna stick it to him again and obviously advance to the final round haha..

As for QB's, I have Joe Flacco and Kerry Collins. Joe is at home against the New Orleans Saints and Collins is at home against Houston. I'm leaning more towards Collins as I have him starting right now.

For WR's, I have Mike Williams(vs DET), Kenny Britt(vs. HOU), Mario Manningham(vs. PHI), Percy Harvin(vs. CHI) & Austin Collie(vs. JAC). Right now, I Have Williams & Britt starting as I feel Britt is a definite start against Houston. I'm definitely not going to use Harvin, so it's pretty much between Williams, Manningham & Collie. I was skeptical about Mario & Collie cuz of there recent injuries. Any help please?

(I also have a flex position which I have Kwonshon Moreno in right now. Steven Jackson & Jonathan Stewart are my 2 RBs)