I'm originally from melbourne and have been to avalon in the past. Always a good show but weather can be dicey in Melbourne. RAAF has always put on a fantastic display from the Roullettes to F-18 Hornet and my personal favorite, the F-111 "dump & burn". Did you see that this past april?
I was just at the California International Airshow this weekend and it was awesome.
An F-18F almost broke the sound barrier and the civilian aerobatics guys were mind blowing.