This is the thing, there is no single "Best" USB cable. The success of a USB connection hinges on the implementation of the interface on either end as well as on what's required or desired for a given situation. Like with all accessories and components, system synergy is key, and user preference also plays a part. The best advice that I can give is to try a couple of cables and trust your ears.
The shortlist probably looks something like this, in no particular order:
- Intona Ultimate
- Shunyata Research Omega
- FTA Sinope
- Jorma USB Reference
- Sablon Evo
The list is certainly not complete but it should be a good starting point.