I use A30s and they're good. Comfy to wear pretty much all day and sound quality is good, only thing I'd say is that if you have ANC turned to high it can lower SA quite a lot due to the sheer fact you basically can't hear anything going on around you, in prop/GA flying thats great but flying a commercial jet it's not as helpful, so I tend to leave it on low. The only downside I notice is that with Pro Flights the wearer can have an earpiece out while fully wearing the headset if they need to speak to someone not on headset where as with A30s you tend to have it crudely pushed up/off an ear