PS Audio Digital Link III - USB Input Worthless?

I loved my DLIII even better when I added a HiFace USB>Coax converter. Inexpensive and the new one is asynchronous and sounds great.

use a USB/SPDIF converter. I own the DLIII and its optical and digital coax inputs do better than the USB, when connecting the USB directly to a computer. I use a V-link in my USB signal path, which brought the sound quality up. I now feel the sound is a little too forward, but this is probably system dependent.
IMHO, running music off my laptop through the V-link to the DLIII sounds a little better than using my CD changer as a transport, but just a little, the difference is not tremendous.