I've posted this elsewhere before, but this audiophile optical USB cable was a game changer for me, and only about $200. No better galvanic isolation than optical. Easily bests the AQ Diamond and Curious Cable. Receiver side requires a separate 5V power supply though, and the source side is USB 3.0 only (doesn't work with USB 2.0 ports).
https://fibbrcable.com/products/alpha-us...udio-cable
https://fibbrcable.com/products/alpha-us...udio-cable
Devialet 1000 Pro CI - AQ Diamond AES RCA-XLR Link
PC - ifi iDefender+ - FIBBR Alpha Optical USB + "Studer 900" LPS - Singxer SU-6 - AQ Diamond AES
PSB Imagine T3 - AQ William Tell Zero / Tornado / DBS Level-X - PliXir Balanced AC
