This is really a meaningless thread. Garrett and Phillips will decide when and how to use the running backs we have. They have a little more experience, knowledge and insight then we do.
Personnaly, I would like to see Jones in the game early to keep defenses guessing. Does that mean he starts? No. Just get him to bulk of his touches in the first half. Once we get a lead and start the second half, MBIII can pound the defense and finish them off. Choice will be a good spot player to rest MBIII and to make defenses wonder what we intend to do.
Barber is not a break away threat, but he is a solid back. I liken him to Riggins and Campbell. He will get you three yards when there are none to be had. Fourth and one, I am putting Barber in. Third and 12, I am going with Jones. Each situation will call for one or the others particular skill set.
We can not risk Jones to a constant pounding. He is not built for that and the risk of injury isn't worth it. MBIII thrives in that role.
Everyone wants their pets cats out there all the time, but it doesn't work like that.