I would grab Westbrook in a heartbeat if he was there at the end of the 2nd. Westbrook is easily top10 material in a PPR league... Big3 RB + Westbrook + Stud WR? Congratulations you are officially the team to beat.
I couldn't falt you if you went Big 3 RB, stud WR X 2 either. But Westbrook just looks too good to pass up in a PPR format. He's primed to catch 80+ passes IMO (equiv. = 13+ TDs)