Best Audiophile USB Card ?

[mesonto]

Someone please take this seriously. I am thinking of spending a few thousand to recreate my present Audirvana music streamer which as of now resides on a stripped down version of Win10 (only runs a few services and Audirvana), in a fanless case with an external audio grade power supply.

 

Saying this...

 

If I was to build another newer Windows PC to serve as my new FLAC and DSF server based on an ITX motherboard, and I output my files directly to my DAC which has a jitter reducer/master clock/etc., inside of it already, why would I need this special USB card as part of my new computer music server? Especially since the USB data is already error corrected and buffered. 

 

Just don't want to spend my money for a small percentage sound quality return.

 

However if one of these $500 cards would make such a difference I am willing to move forward with the many purchases I would need to create a new music streamer.