I guess my only complaint is that Lightspeeds need to be repaired about every other year. I bought one of the original 20K headsets at Oshkosh '96. This was before they had even advertised. I have sent them back at least 6-8 times. Lighspeed had always been good about repairing them no-charge, even replacing the ear and head cushions. The fabric falls off the cushions very fast. I had to send the headset back about 2 months ago and was told that Lightspeed no longer supports this headset. They would try to fix it but if any of the parts were out of stock, then they couldn't fix it. In that case, my only choice would be to pay $200 to upgrade.
Fortunately it was only a bad cord and I was charged $30 for the new cushions. While I have gotten my moneys worth out of the headset, I just don't think the Lightspeeds are durable enough... and they are discontinuing support for older headsets. I've never heard of David Clark doing that.
I'm afraid I won't be buying another Lightspeed. I may have to try the in-the-ear setup that Ironflight is using, sounds like lots of people really like it.
Karl