My tube headphone system, a Headphone/Desktop System by JohnR

Raspberry Pi 2 and HifiBerry music streamer
System Overview
Please ignore the picture above! I don't use that DAC/amp any more. The only thing has remained stable in my headphone setup over the last few years is the Hifiman HE-560s. I don't know why but these are IMO really under-valued headphones, I've tried Audeze, Sennheiser, Beyer etc but the 560s are what I have kept.
Music Preferences
Anything good.
Listening Impressions
With the switch to the GE 5670s, I'm not finding any flaws with this system, within my budget anyway.
Digital Source
Currently, Cowon Plenue M DAP. This DAP uses a Burr-Brown convertor, and I really like the way it sounds.
Power Amp
Schiit Mjolnir 2 with GE 5670 tubes (and adapter sockets).The GEs really do it for me, neutral with just a touch of tube warmth.
Hifiman HE-560. Still by far the best in that price bracket, as far as I have ever found anyway.