Sennheiser PXC 550 Bluetooth Noise Cancelling Headphones $468 at Addicted to Audio

These headphones are somewhat similar to the Bose QC35. Most reviews indicate that these have better sound and more features but that the Bose are still slightly better in the noise cancelling department (some people report that the PXC 550 is just as good or better though, so it is subjective)

This is by far the cheapest available at the moment - next cheapest that I've seen is $596 at Harvey Norman - I went into a Harvey Norman store to see if I could try them out in person before purchasing but they didn't have a demo model that I could try. The lowest they would go was $529 because Addicted to Audio doesn't have stores nearby.

Even ordering from Amazon, these headphones are $399 which equates to about $530 before shipping and doesn't include any GST, so I think that this is a pretty good price. They've been available on Amazon for a few months, but they've only been available from Australian sellers for less than a month, so it's not bad to see such a large discount from the (IMHO somewhat inflated) RRP of $629.