Who do you like more?

[CJizzles]

Most fantasy trade deadlines are approaching. I'm looking to upgrade my RB group.

I figure I can flip a WR for a RB no problem.

My RBs: Foster, Stewart, DeAngelo Williams, DMC, Dwyer, Taiwan Jones.
My WRs: Welker, Cruz, Garcon, Alexander, DHB, Myers, Miller.

Now of my three big name WRs which do you tend to part with? What value does he bring?