Slightly off topic, but I have Quad ESL 2805's which sound wonderful on my Stereomour I. Loud enough for my tastes, and the sound is just very very good. Very transparent, very spacious, very SET-like beautiful. I also listened a few times to the ESL's on a home-brew 300B, and the sound was even better.
I think that Tubes & ESLs are a match made in sonic heaven.
Aske