Has anyone ever listened to the KEF headphones? Something like the M500. I have the McIntosh, which are amazing, however not sure I am going to be using them enough to have a $2000 headphone with the recent purchase of KEF speakers. I would still want something good if I do decided to sell these brand new McIntosh MHP1000 though.

So looking for opinions of people who have had the opportunity to listen to them. I do not have a dealer near me so any purchase is sight unseen.