Crave high-end audio, but use Linux? The situation surrounding this has been bad in the past, but that's not so much the case now, especially where ASUS' Xonar family of cards are concerned, including the headphone-specific Essence STX. Thanks to dedicated developers, the support today is just about as good as the audio quality.
http://techgage.com/article/using_the_asus_xonar_essence_stx_under_linux/
