In article ,
wrote:

I'm going to update my 15 yr old SoftComm mono headphones and would
appreciate opinions and reasons on choice of replacement.

I don't fly many hours a year or particularly long distances (3hr max)
so I'm leaning towards the David Clark H10-60 or H10-13.4.

The only difference appears to be weight and choice of boom. Since my
old headset uses the wire type boom and works fine what's the
practical differences. Any other options appreciated.

The DC H10-40 (wire boom with M7 electret element) is still available.
They do not advertise it, however.
I prefer the wire boom to the flex boom.
The wire boom can be moved closer to ones mouth and will remain in
position better than the flex boom of the the -13.4.