Best Integrated amp for Wilson Audio Sasha


Thinking of the Gryphon Diablo, Acuphase E560, Passlab Nt-150 or Dartzeel 8550 for the Sasha. Any recommendation from those using this speaker?
hifinuts
Anyone familiar with Swiss music? And what the hell is A. Lange&Sohne anyway? Rolex I heard of. Swiss sometimes have interesting ideas about things including prices. As a result of this advanced thinking most of their stuff is good and way overpriced. For $25k you can blow the f... out of those Wilsons with great separates. So who needs this? Swiss perhaps. Anyone else?
"So who needs this?"

It was the author of the thread who asked about darTZeel - it was not an unsolicited recommendation.

PS - Lange is a German, not Swiss, watchmaker.
To correct my earlier post, the ARC amp I heard powering the Sashas was the ARC Reference 110 power amp, driven by a line stage from the same Anniversary Reference series.
"Dob- I don't know what you are saying, but the speaker is not particularly easy to drive"

Hello Keith - it is poorly written joke. Efficiency is related to air pressure of sound not its quality...

Sorry, of course, you are right - sound quality at certain frequencies will be much worse then at other due to difficult loads.