Rivers vs Stafford vs McCowen

I currently have Phillip Rivers (and streamed Brissett week 9) as my QB, but during last weeks byes, folks have dropped McCowen and Stafford. Should I look at one of them as an upgrade?

stream Stafford this week if you feel ilke sacksonville is gonna slow down Rivers. McCowen is a QB1 depending on matchups. I think you could use either one,