The Etymotic ER-6 is THE ideal headphone for the AXIM-actually ALL PDAs in general.
http://www.headphone.com/layout.php?topicI...ctID=0020100100
It's very portable and the sound is incredible. It cuts out most outside sound so some may find it a bit unnerving...
Some cons: some people find it too uncomfortable (it literally goes way inside your ear canal); it's somewhat pricey ($130).
It's only for serious music-lovers...
cheers,
:)