RB problem!!?

Okay, its the first week of my playoffs and I have a RB dillema. I have Adrian Peterson, Joseph Addai, and Ernest Graham. I can only start 2 of them. I was going to start Addai and Peterson like I always do, but a lot of "experts" are saying that Graham is going to have a huge week against the Texans. Its a good problem to have I guess, but its a must win situation. Who would you start, and why? Thanks in advance everyone.