I reckon below are the best 4 batsmen available for Australian selection(in order of how I view them).
Clarke
Hughes
Rogers
Warner
After these 4 I struggle to find the rest of my lineup with there being little to separate Cowan, Dussey, Cosgrove, Voges, Watson, Burns, Khawaja, Smith, Doolan and Bailey when considering career performances and recent form.
As such all up my team would probably be the below although 4 and 6 definitely change based on my mood.
Watson
Rogers
Hughes
Voges
Clarke
Watson (if bowling) or Smith (based on recent performance)
Wade
Pattinson
Harris
Bird
Lyon
Reserve Batsmen: Cosgrove or Cowan.
Reserve Keeper/Batsmen: Haddin
Reserve Bowlers: Siddle, Starc and O'Keefe.
I don't consider Burns to be too far from national honors. Currently has 5 centuries(the same as Smith and Doolan) while having played far fewer matches. I see him as the medium to long term number 4 for Australia if he kicks on.
Rogers takes Cowan's spot due to his experience, career performances and current form. Voges takes number 4 since he bats there in the Shield, has experience in England and also provides a SLA spin option. Watson or Smith take up 6. Watson gets it if he bowls otherwise Smith gets it due to doing well in India.
The bowling attack features 3 pace bowlers(when fit) who can keep things quiet while still destroying lineups. All are more than capable with the new ball so Pattinson and Harris would probably take the new ball and start with shorter spells. Lyon keeps the spinners job but if he truly struggles(2-3 bad games) O'Keefe gets a shot.
All in all the team balances experience and youth. By the time Rogers and Voges retire or get dropped hopefully at least 2 of Hughes, Warner or Smith are settled in the team. Then Burns and the next batch can stake their claim in a slightly more settled lineup.