Most valuable WW RB?

[Asthmatic]

10 team standard scoring league, 2 QB starting.
Looking to pickup a RB off of WW right now, but not too sure which one is the best to grab, was wondering what some people thought?
Currently available:

D.Richardson
J.Dwyer
B.Wells
A.Brown
M.Bush

Let me know what you think about the options and who you prefer or think would be the best choice. Thanks!

[zechs]

Beanie Wells looks like the best pick up out of that bunch. When healthy, he should be the feature back for the Cardinals.

Please help me out with mine? viewtopic.php?t=530117