tried the sennheiser pc 151 on the new soundcard, cant rly distinguish any big differences, but you can make it louder cause the amp is obviously bigger there.
maybe an audiophile with better ears can notice it btu i cant (only tested music, games might be different also)
regardign the new mic: bowser said its too quiet being clipped to my audio cable going into the new headphone so with the power of german engineering i made a desktop mic out of it,
quality is said to be really good now