Nice looking line up. You might find a gain using PoE + 1m Supra CAT8 rather than the DC4.
Another tip, pushed by Mr Watts, is to use ferrites on the USB (or SPDIF) cable, lots of 'em.
Personally I found a nice gain in placing an Iso Regen twixt uR and DAC.
....all that said, you could just get on listening to music, that WOULD be radical!
P.S. What DAC did you have before the Hugo 2? Any thoughts on pushing the boat out for a Blu?