Their ANR model is nice, 7104 I think it is. Had and instructor who had that, and checked it out. Batter is in the headset. Plug wire plugs into the headset as well, so you can take the cord off and/or replace it easy if it ever gets messed up (I've pinched one cord and cut threw it on an old headset I have from stacking things on it during storage).
Anyhow, it does clamp on well, but don't think I'd want to well the Peltor design for any extended amount of time.
For a solid, rugged, cheap headset, go ebay, and find an old DC 10-30 for around $50.
I personally like Telex. Never a problem, and they fit me right. I like to be able to adjust tension. Higher on hot days in the plane going through rough air, and turn back the tension on a long flight. Fold up nice into the corner of the flight bag. I've worn my DC a couple of times, and some old Flightcoms a friend had, as well as trying on every new heaset I see in whatever shop I go into. I'd never want to wear the DC for more than 30min.
See if where you are getting it has a loaner. And take it on a LONG flight.
Josh