I have been using the QT Halo for about 3 years and am very satisfied.
In a very noisy cockpit it easily outperforms my old Bose X.
I understand that the conformable foam ear tips are better performing than custom moulded ones. I have used the foam ear tips on 4 hour flights with no discomfort.
The Clarity Aloft looks a more robust product, but is much more expensive. If you handle carefully, the QT should last a long time.