I kind of wonder what you guys would think about a really warm SS amp like the burson conductor or Audio-GD Phoenix.
The Phoenix is warm and smooth, little bit "heavy" in it's sound signature. I personally didn't care for it since I felt it colored the recordings too much. But maybe it's what you need?
I also liked the character of the Burson HA-160 though, but the synergy with the HD800 was terrible. I've heard that the conductor is supposed to have better synergy with the HD800.
Also, I've been working on something... stay tuned.