I used my Clarity Aloft headset, which looks to me to be the same as the Halo, in an Extra 300L for several years, and it was great. Much more comfortable than the Bose 10 ANR's I had been using, and with the ANR active in such a noisy plane, I could not hear music from my iPod as well as I could with the Clarity Aloft, especially bass frequencies. I sold the Bose, I will never use another full cover headset again.
I didn't bother to read all 17 pages of this topic, so excuse me for being lazy and just asking:
Does anybody have any comparison's between the Clarity Aloft and the Halo?