I have a pair of the QFR Solo's (passive) for the backseaters, and they are a fantastic headset. I like them nearly as much as my 20K's (active) as they have great attenuation and are ver comfortable and the music inputs sound much better. That said, the active versions should be fantastic.
You might call LS also, as I bought my 20K's 6 or so years ago as refurbs and saved a couple hundred bucks but they were like new.
