Hi,
I recently acquired the Weiss Minerva. I also own the PD MPS5, Esoteric P03-D03-rubidium clock, as well as some other reference grade digital gear. Using a Macbook Pro and setting the output to 24/96 while streaming FLAC files, I was very impressed. The sound was inviting, musical and instilled a sense of rhythm and timing, reminding me of the Naim digital gear I used to own. The output on the Minerva is very high, 6V RCA or XLR (about +17.7 dBu). Not all preamps may like this high an input voltage.
I have not had enough time to evaluate it critically but I am very impressed with the Weiss. However, I just installed it in a different system in a different location and can no longer run a side by side comparison. My impression of the Minerva is such that I would consider auditioning a Medea. Incidentally, I will soon have the Wadia 9 series on hand - it will be interesting to compare all of these units.