The option is always to play Valetini at 6, where he has played for most of his career with the Brumbies and Wilson at 8. The other options at 6 are really Hooper and Leota, and at this early stage of the season I prefer Wilson and Valetini to them.
10 is a really tough one. I am a Carter Gordon fan, but I think you can only play him there if you have someone else to kick goals. I am not really convinced by either Lolesio or Donaldson, I think it's fair to say at this point in the season Lynagh is the form 10, but is it too early for him? We need to see a fair bit more Super rugby before this sorts itself out I think.