I can only start 2 RB, so which ones do you think I should start?

Willie Parker - Steelers vs. Falcons
Dominic Rhodes - Colts vs. Redskins
Chester Taylor - Vikings vs. Seahawks
Reuben Droughns - Browns vs. Broncos
Chris Perry - Bengals vs. Panthers

I was thinking Willie Parker and Dominic Rhodes.
I figured I should bench Droughns because hes going up against a tough Broncos defense.
Chris Perry is supposed to come off the PUP list this week. If he does it will be his first game of the year and I dont know if they will get him involved in the offense right away.