AFAIK, the JLSounds seems to be the best sounding solution which is available for all audiophiles. There are manufacturers with their own USB implementation like Schiit and Denafrips for example but these work only in their own environment. Some people claim that JLSounds is even superior to I2S.
My opinion as well. Have tried all the available usb/i2s boards and this is the winner, especially when coupled to their oscillator board and using nice oscillators. And the variety of output formats makes it extremely versatile.