I have a Bose X operating with a PS Engineering PM-3000, and the sound is
great. As I just posted in rec.aviation.piloting, my experience with Bose
service is also excellent. Even though mine are four years old and were
purchased second-hand with my plane, Bose recently repaired them free of
charge, and also replaced the headband padding, the cable and both ear-pads
into the bargain. That, and they turned them around in a week, and offered
me a loaner if that was going to be too slow! $1000 is a lot of money, but
it's worth it. The $600 I paid was worth it (almost) twice over!

--
Mike Granby, PP-ASEL,IA
Warrior N44578
http://www.mikeg.net/plane