I had the Bose X's and it was a great headset.. I used the X's while freight dogging it.. (Great with music). Very comfortable.. Battery life was far better than what was advertised.. Unfortunately I had to give them up due to impedance issues in the Falcon... Once I switched back the PNR's I was not able to wear my DC's more than 1.5 hours because my head hurt like hell. It took me a couple of weeks to adjust back to the clamp (PNR) style headsets..

I have been thinking about giving the X'11 a whirl.. Oh by the way, If you want to spring for the Bose they have a great payment plan..!!