Hmmmmm, around 300 bucks, I personally like the triode wire labs discrete usb, that’s a warmer more organic leaning cable but not as bassy and not as smoothed over as the shunyata, you should see a bit of a technical bump as well. In the 500 ish range, I personally like the curious evolved usb for something that’s more technical focused and somewhat balanced although slightly pushed forward upper mids and treble which I don’t think will be an issue with a spring on nos (although the holo stuff does have some grain in the upper mids so that could potentially exaggerate that). Something more in line with your shunyata but more capable and less bassy and more balanced would be danacable trustream usb, that’s also pretty great. Around that price you could likely pick up a sablon that sounds like it might match what you are looking for, @Veritas could comment more on that.
You actually could likely swing a used FTA at that price point if you could find one, but used usb cables are very hit or miss on what’s actually available.