My Sharp MD33s had a problem last week with one side going out - I was able to restore with a thorough cleaning, but this got me to thinking that I needed a "spare" pair for an upcoming international trip. I went to Circuit City with the Amazon printout, and happened to run into the manager in the store. He said that they do not normally price match Amazon, but I guess he was feeling generous because he chose to anyway, so I got a pair for a little over $22 including tax.
When I first tried them out, I found them to be lacking in bass compared to the MD33s (I like lots of bass,) but after several hours to burn-in, the bass settled in to at least equivalent to the MD33s, but the midrange and treble are far better than the MD33s, with much better details in vocals and instruments being audible.
I believe that the JVCs will become my primary "airplane" choice with the Sharp MD33s demoted to "spares."
The JVC air cushions do have a "Y" cord. I have not decided whether I like it better than the "J" cord on the MD33s. With the "J" cord, if you take out the earphones on the plane when you need to hear, you can just leave them draped around your neck.