08-13-09: Opteron05
...While I recognize that all cables and connectors can have a significant effect on sound, my limited budget forces me to look for the greatest dollar cost / benefit in my system.
...So, for now, at least, I feel that I would realize a more significant effect from a higher quality DAC at $299 (The Music Fidelity V-DAC) than I would from changing to a higher cost cable...
Well, what I am getting at is that since you have a fairly recent DAC in your NAD pre/pro, and are contemplating getting an Emotiva UMC-1, which has an even later generation upconvertling DAC, maybe it's more cost-effective to upgrade the digital link to get the best use of the DACs you have or plan to have, rather than buying yet a third DAC in the V-DAC.
There are some good coax digital cables for significantly less than the V-DAC, such as the Analysis Plus Black for $75/meter, AudioQuest VDM-1 for $65/meter, or Cardas High Speed at $107.
That said, I've heard very good things about the V-DAC, not just from professional reviews, but from a long-distance friend who bought an Oppo DV-980H, a V-DAC, and Cardas High Speed digital cable rather than a $600 CD player. He's VERY happy with his choice.