As a QLD fan, please pick Barrett and Kimmorley in the halves again. That particular selection is called 'burying ones head in the sand'. Both are at the twilight of their careers - the longer the keep playing Origin, the greener their replacements will be when the finally retire.
Keep Kimmorley, he's the better of the two, and pick either Mullen or Pearce at 5/8. These are NSW two best halfback porspects once Kimmorley retires.
Next year, put them both in the halves or maybe throw Campese or Carney in at 5/8 depending on form.
But you need to start training the next generation of halves NOW. Don't forget, even Andrew Johns was forced to play hooker once or twice, instead of halfback.