To be honest there is not a single good card out there on the marked, the output effect it to low to get the maximum out of high end headsets (not counting usb ones ofc), and the price is just way to high on the top models.
So my advice is to get a propper amplifier and just get the signal out from the computer and use the internal DAC in the amplifier to get the best quality.
So buy a small headset amp, it comes cheaper then the most high end sound cards, and the quality is 100 times better and you have anough effect to drive multiple high end headsets.
The Argon HA1 is a small, yet brilliant little amp.
or if your not planing to lan with it, you could just get a used normal stereo amp and use that, then you could hook up a coupple of nice floor speakers aswell for non gaming use.