I generaly use 2500'. I suppose in Aus with a less dense atmosphere, it takes alot longer to get to 3000' than it does over here (especially with your dodgy Avgas as well
).
As A&C quite rightly said, it can easily end up in a spin recovery lesson. I had a student decide to go with full rudder in a wing drop stall and drop it into a spin. Good learning experience for the both of us - him: correct stall recovery; me:don't get too complacent.