I'd go with Vlad if he's still available when you pick. Soon after, yes, start picking up pitchers. But pitchers are so unpredicable and most play one out of 5 days as opposed to hitters. If you've got a chance for Vlad, get him. The top three pitchers (Arizona's duo and Pedro) have too much injury risk.
I realize that RJ hasn't been injured in a long time, but at his age it's a strong possibility. Look at Maddux last year. First time in the DL in... his life? Since his cubs days? And though he's still good, nobody considers him first round good anymore