dcaudio: i have heard both the nagra ss (mpa) and tube amps (vpa) connected to the nagra pl-p and tube line stage using tara, the one and the zero, as well as other ic's. i preferred the tara to all others. i own the one; when i upgrade it will likely be to the zero. BTW, i think the nagra audio products are first rate. if i had the $$ just now, i'd quite seiously consider buying the mpa to replace my jrdg (the vpa's won't drive my speakers, unfortunately).-cfb