You may consider my system as "entry level" but I'd disagree (it's actually very good), and on most other forums, I'm accused to splashing out far too much on kit that other members consider could be matched with their sub £1K systems! Incidentally, I'd put my speakers up against yours any day - I used to own Active 50s.
In fact I don't use and would avoid using USB cables for audio, so I shouldn't really comment other than to question how much of a difference a £6K cable makes over a £15 one. We will never know!!
I try to avoid cables altogether wherever possible, as the cable that IMPROVES a signal has yet to be invented. It's just how little they spoil the signal that is relevant, so eliminating them as far as possible seems to me to be a good thing.