Hi,
It comes to my surprise that David Jones is offering the 10% off their Mac and this discount actually comes off the original old price. For example, the Macbook 12" 256GB was listed for $1,799 (compared to the new $1,999), so takes 10% off, it is now only $1,619.10. Plus the 10% off eGift Card through Entertainment Book and/or 7% cashreward, this is the cheapest price you could get for now.
Not sure when the deals will end.
Edit: The 7% cashreward doesn't apply to Apple products as per T&C.