Mike,
For transparency, my favorite is WW Platinum 7.
For organic musicality, my favorite is Totaldac USB, followed by Cardas Clear.
I find that every USB cable sounds different but none sound entirely right to my ears. Every one appears to be a compromise in one way or another. My reference for "right" is the way my K-01X sounds when I place a CD or SACD in its transport. For others, it may be the way the Lumin S1 sounds. I believe this variation with USB speaks to the inherent weakness of the connection compared to other connections such as Ethernet or I2S, which I believe will ultimately win out in a few years from now.
Ken