Articnoise
Headphoneus Supremus
I'm adding an AQ Diamond and Peter's Lush to my list of USB cables to try.
I also want to compare an AQ Niagra 1000 power conditioner to my Audience Adept Response aR1p/CablePro NANA.I know we are going a bit off topic but I know these items improved the performance of my Chord 2Qute. In this case of the Chord Hugo TT, think a good USB cable would have bigger gains over a power conditioner because of the Chord TT's battery technology. Garbage in, garbage out. I would much rather get clean power to the rest of my system. i.e. headphone amplifier/microrRendu PSU. It all matters.
A power conditioner, power regenerate or isolating transformer will probably not be needed for your Hugo TT, but most likely will for your server, source and amp if you use one.