Add Breaston and drop Spiller?

[Therobsclub]

My Team:

QB: Brees, Vick
WR: A Johnson, R Wayne, B Marshall, L Evans, M Williams(Sea)
RB: Mendenhall, Moreno, F jackson, K Smith, CJ Spiller, B jacobs
TE: Witten
K: Carpenter
D: Saints

So right now I'm in the midst of a trade. I'm giving Wayne/Jacobs/Evans and I'm getting Turner/DeSean jackson
Should I keep spiller in case Buf gives him the reigns towards the end of the year or pick up breaston seeing he has good mojo with anderson?