Hi mate. Yes, mostly Thredbo or Perisher. Have been to Hotham a couple of times also. Last couple of years haven't been able to get down there as much as I'd like.
Rockies are sensational, especially BC Canada. Have been a few times. Huge mountains, but Japan has the best powder. Decision, deepest powder, or biggest mountains?
If you've got a month the Rockies is the way to go. Try starting in Banff and working your way across to Whistler. So much great terrain! Did it in 2004.