Hi Darren,
I've MF's V-DAC in use for a couple of months and I am very satisfied with it.
It is very convenient as it has three digital inputs: USB, optical and coax.
I use them all to feed it with bits from my laptop, Conceptronic media player and CD-player.
I've not done extensive testing between these inputs and have not compared it to other DAC's but it certainly improved the sound of my Marantz CD6000KI. I've not yet tested which connection is best, optical or coax but my cd-player has both and my media player only optical.
Regards,
HJ
