Anya Garnis, who was briefly on the show would be good, Camilla Dallerup or Iveta. Camilla does the NZ version though, I think.
Some of the others who would be good already do other versions of the show (as judges). I would like Karen, Erin, Ian, Matthew or Anton - I wonder if they would ask Kristina?
I would not like Brendan (doesn't he do another version already?) as he does have a habit of falling out with people and I am already weary of any claims that the judges have favourites/haterz. Not the Jordans either (same reasons).