David,
Unfortunately, this is the only amp I have tried. I got this amp in quite weird circumstances (that I do not want to discuss here in public).
Anyway, at first I thought that it brought a significant improvement, but now I'm not quite shure. It may lack the ultimate transparency. I will have to do some more testing to pin everything down. I'm also planning to borrow friends JRDG Synergy II by Cytocycle sugestion.
The gain of Lamm amps is not really a problem, unless you use a preamp with an unusually high gain (like VTL 7.5). Lamm's own preamps have a gain of 20dB, which is an industry standard. All preamps of similar gain should work without problems.
Conrad Johnson amps have even higher gain - 35dB in 350SA - and yet, I never heard anyone complaining about that.
If you have any more specific questions about my setup, pls ask them in my system thread. I do not want to hi-jack Steve's thread !