The Pirates are going to give Snider a chance, he's young, cheaper, and has much more potential than Murphy. I'd stick with Snider... Neither guy is going to do much for you now, so you have to play with potential and Snider has a higher ceiling.
OF (x3): CarGo, M. Bourn, D. Jennings
UTIL (x2): E. Encarnacion, C. Hart
BN: Cuddyer, C. Ross, J. Montero
SP: Price, Gallardo, T. Hudson, Lester
RP: Chapman, Jansen, Rodney, Putz, Cishek, Bailey