Timztunz,
You have a great looking room, there. I haven't heard all of the USB Dacs, but I have heard many. I have also done extensive research with the USB protocal since, well, the beginning. I fault its inherent limitations, specifically it's transmission method and taxing of the cpu. I have not yet heard the Tranquility yet. It has gotten rave reviews and was also a best of show at RMAF. I am certain it sounds excellent in your system. I am at a point where I have just abandoned the interface. Perhaps if I ever hear this dac, I will change my mind. The best USB DAC I have heard so far is the Ayre, which I thought sounded thin, not too great in the dynamics and just didn't bring the emotion home. Again, I fault the protocal, not the hardware. Enjoy your beautiful system.
