Depends what kind of aircraft you are flying. There are a number of good ANR sets, for example the Bose A20 and the Lightspeed Zulu 2. I would prefer and choose the latter because of the extra features, better value and better if not equal ANR.
Other types are good if you are looking for the lightweight, small cup style ANR headsets such as the Sennheiser HMEC 26 but it is known to have some discomfort due to the pressure on your ears if you have the headset on for a long time.