Best data enabled DACs

What I noticed while lurking around, is that when people discuss regular DACs with SPDIF input, they speak mainly about sonic signature and other audio aspects (which I consider to be a good thing). When discussing USB and other way data enabled DACs, people tend to concentrate more on computer related issues, mainly data transfer, leaving audio well out of scope.

May I suggest to list in this thread all known to audiophile community DACs that can accept anything beyond a regular SPDIF input: firewire, USB, whatever else - with your sonic impression of course?