Had to replace my headphones the other day. Bought the HiFiman's He 400i's planer magnetic drives... What fantastic headphones and crystal clear with great clarity. Cheaper then my Bose Quiet comfort Q25, these sound 100 times better. I find the Bose too muffled in sound and not clear enough. Though great on the plane and great noice reduction headphone, these are not a true Hi Fidelity sound. The HiFiman's do leak sound and offers great comfort.... Those these originally retailed at around $500 Canadian, they can be picked up on sale for $250 from Amazon.... The reviews compare these to a high end headphones ranging up to $1000....