I have the QC35 (and had the QC3 before), I just love them. That active noise cancellation is amazing on a plane.Had a quick browse through some Click Frenzy deals last week, and found Bose QC25 headphones for half price and free shipping.
Given that most flights from AU to anywhere interesting are long haul, the noise cancelling is much appreciated. I had an el cheapo Sony NC set, which were good, but as on-ear headphones they didn't always do the job, and got a little uncomfortable after a few hours of wear, and especially with glasses on. they'll stay home now for PC use, and I'll take the Bose on my travels.
I know there are newer models, but the QC35, have an internal battery that only lasts 20 hours, and then progressively loses capacity, and takes a couple of hours to recharge. These take a AAA battery, so when it dies it can be swapped out, no need to wait.
Now I just need a long-haul flight or two to test them out thoroughly...