Compare Realtek ALC892 to ASUS Xonar DS/DSX/DX?

[Safety Control Rod Axe Manipulator]

Of these three, the Realtek onboard, the DS, the DSX, and the DX, which is the best? The Realtek is giving me problems.

 

[gamerk316]

The DS and DSX are the same card, just on different busses. The DX is the highest tier of the three.

http://event.asus.com/multimedia/xonar/find.htm