Any DAC/amp that use UAC 1.0 which which is used for audio, any higher bandwidth DAC won't work , best way is to get hdmi splitter that splits it into hdmi video and the audio into coax or optical based on what Ur DAC /amp accepts. What kind of headphones do you have anyway? Creative have budget stuff that should work and are okay sound, most other devices that use UAC are this budget gaming DACs like SteelSeries or atsro mix that limited to 24/96khz i think due to uac 1.0

If you don't need that much power any portable decide should have decent sound , maybe try https://en.creative.com/p/sound-blaster/sound-blaster-x1

In case you not gonna get hdmi audio extractor