Furthering last post concerning replacing the E11, I know I want to keep an internal DAC if possible and couple it with the desktop amplifier.
Though I couldn't find any feedback on hybrid tubes like the Schiit Vali versus for example a JDS O2. I mention tubes because of the great relationship between them and AKG K headphones.
Is the Vali a fair place to start, or not strong enough from the tube side of things? I know K612s are hard to drive but...Vali seems capable.
Vali should be good.