Aviation Consumer recently did a review of all ANRs and confirmed what we already knew.
Bose-X headsets are the way forward.
AV Consumer uses lab tests and a panel of folks to do real live comparisons. They also get feedback from sellers. They commented that a lot of people send their DC11s back.
Draw your own conclusion.
You can pick up Bose-X headsets a lot less expensive now than a few years back (£550sh)