I'm thinking of picking up Asus Xonar STX sound card for my Sennheiser G4me Zero. But there are unified drivers and official drivers. Which one is better, and which one would you use? Also, within the official driver, would you use Version 7.12.8.1794 2011.06.27 update, or Beta Version 7.0.8.1821 , 2013.06.07 update? This one is confusing because the later driver, the beta version, has lower version number compared to 2011 version. Thanks.