I've had the Xonar DG for quite some time now.. it was a step up from the onboard sound but it left me with wanting for more. I most recently listened to some music through a stock intel board and was quite impressed at the sound superiority and clarity, not to mention the sound separation from different instruments. That leaves me asking myself what can I upgrade this Xonar DG to to get better quality sound? I use a pair of Sennheiser HD518 and the PX100 on occasion, just dont want to settle for less.