In anticipation of my move overseas I just bought a pair of Hifiman HE400i headphones.
https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1
I was a bit suspicious of the low price but saw it was sold direct from the manufacturer. Turns out it shipped directly from Hong Kong and took only 3 days to get here.
Despite the low impedance and high efficiency, these are not for your average portable music player. However, through a proper headphone amp or my Caiman SEG they sound fantastic, even out of the very glitzy box. Holding them up to the light, it looks as if they forgot to put any drivers in as they are near transparent to light. However, that is because of the lightness of the magnetic planar drive units. They remind me of my Maggie speakers: speed, detail, attack and an extended though not overblown bass. Only, downside (apart from hot ears) is that the cable is very short, but being detachable can be replaced.
Geoff