Use: music, mostly orchestral
current setup: 558's, on board sound (7.1 CH HD Audio with Content Protection (Realtek ALC892 Audio Codec))(idk enough about auido to know if thats exactly what you're asking for, thats the information from the mobo)
no other i/o, i only use the headphones
budget: would like something sub $80, it's really just a replacement for the on board sound