I think KH should stick with Robbo and Casey in the centres unless Tyrer is fit in which case give the nod to Casey and move Robbo to the bench. Despite us having two other centres those two have looked our best option in the other spot this season.
Brown should come back in at the expense of any of the nines. May as well toss a coin there but I would go with Holden simply because he gets the ball away from acting half about twice as quick as the other two.
Oh and we want a strong ref, we got Warren Turley I believe instead.