The best recommendation I can give is to actually try the headsets on because some will feel more comfortable than others - I was set up to buy a pair of Sennheisers and found they sort of "perched" on my head, the Zulus fitted perfectly. If you're only ever going to be flying for half an hour or so at a time, you can possibly get away with uncomfortable headsets but I can still fly for hours on end, remove my headset and not have the DC Headache that others have.....
So: try before you buy, if you can......