Coax SP/DIF to USB..thoughts?

I now have a DAC ( I like this DAC a lot, so it is not getting replaced) that only uses a CoAx input and does not have the ability to input USB. Many streamers seem to utilize just USB as their output. There are a few USB to SP/DIF cable converters out there, but I have not heard any of these cables, nor do i know anyone who has. For those who have heard this type of conversion, is this a good way to go? 

Personally, i prefer the SQ of a CoAx cable to most all of the USB cables i have heard. Thoughts?