Murray hasn't shown breakaway speed while he has been here....go back a couple years ago when he had the huge game against the Rams...he got run down then too. He gets positive yards most often , has plenty of 15-20 yd gains and is dependable. You just don't throw that away.
Randle and Dunbar likely are neither more than 15 touch a game guys.
I am not in favor of AP, I think he is going to cost more than most think, he is closer to the end than Murray and we know the end comes fast, especially for guys that are more of a speed back than all the way around. Oh yeah,he is also a confirmed child abuser and I don't want him on my team.