The contenders in my order would be;
Hughes (Just come off a ton)
Marsh (Come off an 82 and an unbeaten ton in one match)
Klinger (Unbeaten 200, unbeaten 100 in one week)
Voges (Goes pretty well, unbeaten 50 this week, unbeaten 50s in last week's shield match)
Bailey (Very solid without dominating, but he would get the job done)
Cowan (Double ton early on, another ton and a fifty as well)
White (I don't know lol)
Robinson (Eh, he might be 28, but Klinger's 29 and raping, I don't see why Robinson can't)