The Audio Aero in case you missed it the first time it was posted. The early version of the Prima has both manual analog variable output through a 6DJ8/6922 or a variable digital output through the very responsive remote. Highly recommended. I don't know if the current Prima offers the same flexability, but I'm certain it has one or the other. BTW for its price the Prima is a good product.
Conversely I would not keep my head buried in the sand regarding universals, they are dirt cheap and are not as sonically (or format) challenged as the high end makers are going to find out. I was stunned by the quality of signal I heard from one I bought, for another purpose, not modded for less than $100.