Several months ago I got a demeter hm1. I got it because I wanted a good quality stereo tube pre (and I got it for a very good price).
I was not disipointed with the pre end of things, but I was shocked with the quality of the DI. The first time I used it, I was recording a bass player that I had recorded several times before. When he started to play, he quickly stopped and asked me what I did to the bass. He was very impressed.
The Demeter unit is the only DI that I actually prefer by times to miking electric guitar as well.
IMHO this DI smokes my grace, focusrite, and dbx units I have.