Ivory & Woodhead, who do I drop?

[TheDandyFop]

I am going to pick up Christopher Ivory for sure, and possibly Danny Woodhead. I need advice on who to add/drop.

Roster -

QBs -
Tony Romo
Michael Vick

WR -
DeSean Jackson
Steve Smith(NYG)
Jabar Gaffney
Kenny Britt

RB -
Adrian Peterson
Peyton Hillis
Ryan Torrain
Marshawn Lynch
BenJarvus Green-Ellis
Brandon Jackson

TE/K/DEF are all fairly irrelevant, can't cut them since I need to start one of each.