Is there a significant difference in features between the entry level Xonar cards like the DGX vs the higher end cards like the Xonar Essence STX or the Creative Xi-Fi Titanium HD if all you care about it sound through headphones?
While I do have an analog output to a receiver to power some stereo speakers, I predominately use my sound card for gaming and listening to music via headphones (will be purchasing Beyerdynamic DT770 Pro 80). So I don't necessarily need optical outputs/inputs nor do I need Dolby Live functionality.
I care about music sound quality and surround virtualization. Also I would like the auto-detect to work on the front panel so I can jack in the headphones without switching each time in the software. I understand that is a problem with some of the cards.
I am willing to spring for the Titanium or the Essence if it would qualitatively make a difference in headphone listening. But if not, then I would just go for the DGX.