Very very impressed with the sound, easily the best midrange I've heard to date and to be honest I was kinda both hoping and expecting for this to be the case. My now patented 'treble resonance' test using Track 4 from Italian Oboe Concertos Vol 2 passed with flying colours, it was incredibly smooth and life-like. The harmonics and interplay between the Clarinet, Flute and the Oboe sounded stunning.
My usual demo mix of non-classical stuff consisting of Tom Waits, Cassandra Wilson, Hope Sandoval and Ted Hawkins sounded just as gorgeous.
If I had to nit pick it would that I've heard a more extended treble from a lot of other systems but extended treble is something that scares me and to be honest once I adjusted to the 57's I didnt miss it in the slightest. That golden midrange just dominated.
Pearse soon arived with his Lampi Big7. A seriously impressive piece of kit and it sounded just as gorgeous when it replaced the Lampi4.
A few pics below. My HTC phone isnt great with correct exposure with any sort of strong light in the room.


Conclusions....
Computer Audio: What I heard was very impressive but I'll be completely honest, it didnt sound any different to the Meridian CDP feeding either of the DACs to my ears. Now we didnt level match properly, so perhaps not a fair comparison, but all I heard was the Quad ESL sound dominate each time. Not yet convinced that it adds anything above what a normal CD transport can deliver but certainly a test I'd like to return to with a proper level matching kit and test tones etc. Maybe we can arrange sometime?
DACs: Both the Lampi's sounded really good but what did catch me out at one point was when I was listening to a piece Biber Missa Bruxellensis. I thought it sounded extremely good through what I thought was the Lampi 4 but to my surprise it was coming from the analog section of the Meridan CDP. The lads were fiddling around with the Lampi Big7 at the time.
Still not so sure that there are night and day differences between DACs and if they are there they are small and subtle at best in most cases.
My own system: What I heard last night immediately brought me back to that first two evenings I had my Quad989s with the Devialet with that 'real' midrange and timbre that stands out with ESLs. Since then something has been lost in my system and I cant figure out what. Most certainly it's not a source or electricity issue, its either down to a problem in one of the Quads or the Jadis amp. I hope to shed more light on it this coming weekend.
Anyway, big thanks to Tony for the evening. Couldnt stay as long as I wished as I had a very early start this morning but very much worth the trip. Quite smitten with the 57s.