Portable audio users like a cancer grow. Ho ho ho. And in the stockings of good boy and girl audiophiles go Santa's greatest gadgets. Ho ho ho. 2013 has seen some impressive gadgets- it may, in fact, be the year most impressive year among the last few (cue DJ Tiësto's In My Memory).
I'll keep things simple though: one earphone, one amp, one DAC, one portable player.