After months with the Teton, I think I prefer the EC445 (EML 45 solid plates) for bringing out the strengths of the HD800 in terms of stage depth and width and the way details and transients are done. So I brought the Teton home from office and drove my lowly DT880s with them.
Holy crap. I've never heard my DT880s sound this good. Expansive soundstage, quick as hell transients, natural tonality with a touch of euphony, everything I didn't expect from an inexpensive pair of headphones like these. All without the fuss with cable/tube-matching and modding required to make the HD800s sound great.
I was reading that the Teton isn't too much spoken about on HeadFi (good review on Headphone.Guru) but did you get the chance to listen at the Cypherlabs Prautes (no review I think) which seems to pair also very well with HD800 ?