Great choice of DACs. I bought a used TADAC about a year ago and loved it so much I bought a new one from Paul for a second system (Cambridge 840A and Focal 807Vs). After a number of tubes (Tong-Sol, Radiotechnique, RCA, and Siemens) I chose Tele smooth plates due to their ability to create "air" around the music (the Tong-Sol and Siemens were close seconds due to their clarity, nice midrange, and tight non-boomey bass). However, the Teles also took the edge off female vocals without rolling off the highs and have solid bass as well. My main system is a Prima Luna Dialogue 2 with Dali MS5s. Both my systems can be bright on the top end with the wrong electronics and the TADAC is detailed without being bright (especially with the Telefunkens).
I found their was a big difference in digital cables with the TADAC. I started with Monster (crap - dull and rolled off), Audioquest (cheaper model - good detail but a little shallow sounding), Acoustic Zen Silver Byte (nice balanced cable top to bottom and could have easily been my final cable), finally chose Audioquest Eagle Eye due to a level of detail that was hard to find in other cables. It was a hard choice because I am not an Audioquest fan and really did not want to pick the Eagle Eye due to past experiences with Audioquest. However, in the end to my ears it just made the TADAC sing.
One big plus with the TADAC is that Paul is a class act.