Good for gaming, and for workstation and streaming use. If you can add 150 AUD there ya go. But sorry got carried away and got two 1070TI's for that extra beef when gaming so you'll have higher frames which will do you better than a single 1080TI if you can swing the huge price tag along with it.
But in the end you'll be glad you got the better performance out of two 1070 TI's.