Update: See Acejos' deal in the comments for a better deal
Amazon AU currently has the Plantronics Backbeat Pro 2 Noise Cancelling Headphones down to under $200 (+ Delivery). Normally they sell for around $225 (+ Delivery). I have been tossing up between the Bose and Sony, but have been told that the Plantonics is good vaule. Good reviews with most saying it is not quite as good as the Bose QuietComfort 35 II, but better than Sony's WH-XB900N.
It's worth noting these have been $114 delivered in the past. Not saying this isn't a good deal, but they have been a fair bit cheaper.