Question Soundcard upgrade from asus dgx sonar

Steffenbk1

Distinguished
Feb 4, 2014
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My current setup now is a dt770 80ohm, a modmic4 with aux cable and a dgx xonar internal soundcard.

Im looking to upgrad the soundcard, but im struggeling to find a good fit for what i should go for. Internal or external soundcard. Id like something that is good for gaming and good for microphone as well, if anyone has good recommendations for that
Budget around 300$ can go above if its really good