Jmelvin -
Have you tried the Tranquility DAC with the ATV? Going from an old but excellent Theta Cobalt DAC to the new Rega DAC was a very big improvement. The Rega DAC reclocks, whereas the the Theta does not. That probably explains part of the improvement.
In my experience, the Rega DAC at $1k was worth every penny. Not to start a debate about DACs, but I easily preferred my Theta DAC to a V-DAC and a few others in that range when I tried them.