You are the first person ever to say that they prefer the 6000 to the 7000. If you saw them side by side you would not even contemplate the 6000.

With the 7000 you can edit the entire screen which is double the 6000. With the extra screen space and the extra buttons, you don't need to put navigation controls (such as tabs) on the screen. This means that the 7000 has effectively 3 times the editable screen space. This is really dramatically worthwhile.

The 7000 image is far crisper and much easier to read. The 6000 is washed out and hard to read in comparison.

You are also likely to get hit with around AUD$200 in taxes and fees by Australian customs (whichever model you get).