Based on Ted and other’s recommendation I also tried Toslink and discovered that it beat my $500 usb cable regen combo.
All for less than $100 (toslink converter was around $50 and had a decent DS labs toslink that was connected to my TV that worked well.
Haven’t tried DSD yet but I’d be willing to bet it’ll beat all other input\cable combos no matter the cost.
Seems it’s also sounds better with other digital inputs disconnected.
Worth a shot - can always switch back to USB for 2xDSD if that’s an issue…