b/u RB keeper value??

[saemick]

I'm curious as to what the value of b/u RB's is. In particular does someone like Selvin Young have more value in a keeper league than say Chris Henry (Ten) does? I'm thinking more than just this year? Also, how about the likes of:

Adrian Peterson (CHI)
Maurice Hicks (SF)
Brian Leonard & Antonio Pittman (STL)
etc...

What are your thoughts?