A new question then, how good is sound over the I2S? :)
I use I2s with a USB to I2s DDC, I've been very happy with it and am only trying out the SOtM USB Ultra as an experiment for a friend.
However the SOtM is bringing something into the mix but it'll take about a week more to burn in.
This is the DDC and DAC I'm using to excellent results:
I do think you'll get a better result if you do the USB to I2s conversion firstly and then maybe try the USB reclocking later, if you feel it's necessary. BTW I use RJ45 I2s.