Jumping in, have to admit I haven't gone through the 234 pages of posts...
I'm happy with my Lyr/Gungnir stack. I thought to go to Mjolnir as well, but none of my sets are balanced...for now. I run my HD600, K702, and He400 with this setup. My one gripe was a slight hum/buzz that I was able to get rid of with a small device that also helped with my tube/hybrid integrated amp that I use for computer duty. I can share the model/maker if anyone is interested, for the device. I had tried various things but this nailed it, doesn't seem to take away from the sound.
Just really happy with this setup, which is funny on the surface when you think about it. Tubes, solid state, and digital. Like others I have to search for the power buttons on the back, but for every device there's something.
Next up, maybe some interesting tubes from the past...