Last Playoff Game: Need Assistance in RB and WR Lineup

[blameitonthepain]

OK,
For RB's:
So I am starting Cedric Benson for sure.
But I also have Pierre Thomas, LT, and Ryan Grant.
I have to start at least one of them.
I am thinking Thomas? He is at home and Bell is iffy?
Grant in Pitts and LT against CIN, but playing in SD.

For WR's:
I am starting Anquan Boldin for sure.
I also have Santonio Holmes and Robert Meachem.

I can start 3 RB's and 2 WR's, or the other way around, 3 WR's and 2 RB's.
I have my line up now as, Benson, Thomas, Boldin, Holmes and Meachem.

Any thoughts? Should I go with 3 RB's instead? and if so, who would be the third?
Thank you for any help!

[pulljack]

i think i start lt, and meachem for sure. the third is up in the air but i might consider grant.
pit defense has been suspect at best lately.