[LAU] OT: Linux-compatible audio player?

Hello everyone, I need some recommendations for a portable hardware audio player (mp3, ogg, flac) that supports Linux, and is of reasonable quality. A quick search on Amazon pulls up everything from $18 - $200, and I'm afraid to pull the trigger without some kind of recommendation. My needs are simple, I just need to put tons of practice tracks on it and plug it up to my keyboard via some kind of audio jack (1/8"). Power on, select a track, play, experience musical disappointment, power off. :) General brand recommendations are useful, pretty much any info is more than welcome - my trusty mp3 player that was recommended by this list many years ago has vanished, so I must replace it. Thanks everyone! Josh