^^ get something big that plays FLAC so you can carry *everything*
this one looks awesome! but it's $700 lol
http://www.cnet.com/news/hifiman-ult...-jump-for-joy/
(a lot of marketese in that piece but eh-- allow yourself to be impressionable for a minute)
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eta: from the comments i was pointed to this:
http://www.amazon.com/iBasso-DX50-Ma.../dp/B00J6RVQJM
i don't know anything about it but on first impression replaceable battery and SD card up to 2TB (!!!!) is a great proposition, i.e., easy to keep it for a decade or more, comes to $23/yr plus card cost @ 10 yr.
sorry i can't make recommendations as i use mostly my phone ha ha