head-fiers who follow pro equipment will certainly know of the well-regarded mastering equipment and converters from Daniel Weiss (Weiss Engineering, Switzerland; weiss.ch).
Several years ago he introduced high-end audio products (DAC, CD transport) leveraging many of the technologies found in his pro products.
I've just had the pleasure of some comms with Daniel and he confirmed that he is now starting to ship some of his newest products introduced at last fall's AES. Two are targeted squarely at high-end audio hi-res soundfile playback from a computer source, handling up to 24/192 data:
"Minerva" -- firewire DAC
Weiss :: High End : MINERVA D/A CONVERTER
"Vesta" -- interface/converter, firewire <> AES/EBU + SPDIF coax
Weiss :: High End : VESTA FIREWIRE INTERFACE
For those of you going to the upcoming AES Amsterdam, these will be on show.
Some interesting technical info in the linked docs wrt firewire and jitter reduction.