If one dislikes sound quality with AQ Diamond its due to some coloration elsewhere in system. AQ Diamond is probably the most forgiving of top echelon usb cables, this based on many comparative reviews I've observed over the years, and my personal experience. The added bonus of Diamond vs lower AQ models is increased transparency, resolution.
Get your timbre, tonality, harmonic development right, only then will higher resolving, transparent cables show their full capabilities. Towards that end, recent replacement of Audyn True Copper Max and Miflex KPCU coupling caps in 300B amps with Duelund CAST PIO tinned copper has provided both greater resolution, transparency, but more importantly more natural timbre. Harmonic development with these caps has really turned the corner, 005 is now moving into REAL SOUL territory!
Further major changes coming in form of near SOTA custom build music server, power supply and install of Euphony Stylus Version 4. This is not just music player, but full operating system for music servers. This will be tested along with Roon for best sound quality. I'm expecting these purchases in home by next week.