IMO, Marsh should open and Khawaja should go to 3.
I know Marsh has opened in limited overs but has he any experience in First-class cricket? He seems to have the patience and technique for it, I certainly think he'd be a better player there than Hughes! What happened to Calum Ferguson, a few years ago he was meant to be the next middle order bat for Oz, did he have a few injuries or something?
I agree strongly with the Bird, to have only 2 test matches is criminal. Especially going on the last few series these guys have played against each other.