Clash of the Titans

Albert, do you bi-amp your U-1's? You might have overlooked the Double Kronzilla SET monoblocks ($40.000 per pair)
A friend of mine is bi-amping his Martin Logan Prodigy with 2 pairs and I assume if they are heavy duty enough to drive those speakers, they will drive your SoundLab also. And according to him, nothing better for an ESL than a SET amp without negative feedback.
I might be the first person in Germany to set up such a system. I have ordered a pair of Soundlab A-1 to compare the bass against my ML Prodigy in my system in Florida. I have read everything what people say in respect of the bass, so I am very curious how the Soundlab will compete against the Prodigy. But should the A-1 only equal the Prodigy, then the U1-should be the better speaker and I will hook up a U-1 to two pairs of these Kronzilla amps for my German system.
You can read about the giants of SET: www.blackforestaudio.de and click their English website if you like.

Gregm,
these Kronzilla are monster tubes. They take about 120 man-hours to make and Dr. Kron its using the help of bohemian artisan glass-blowers. If I may add my two cents and I do not work for Kron Enterprise, these are the most exciting SET amps in existance today. More a piece of asrt than juts an amp. I just spoke to my friend again and he believes that the amps are very well capable of driving the Soundlabs. And he said if anybody understands amps, a SET with zero neagtive feedback is something really special.
I will soon see and hear for myself.

I will definitely post my experiences here, but since my Soundlab speakers are in the process of being built, it won't be before the end of August, before I can post here concerning these amps and Soundlab speakers.