Week 6 Fantasy Football?

Allright, so I need to fill in a flex (W/R) spot on my Fantasy Football team in a 10 team league. Here are my options: Michael Bush, Warrick Dunn, Devin Hester, Robert Meachem, or Musid Muhammid. Who Do you think I should plug in that will have the biggest impact this week? Thanks for your Help guys.