Best Integrated amp for Wilson Audio Sasha

"I don't think it is a matter of pure wattage/power as how stable will the amp be into a low impedance load. The Sashas dip down to 1.8 Ohms in the bass which can give some amps trouble. Also, sometimes more watts don't mean better sound. For example, I used to have a McIntosh 400 wpc amp. But my 100 wpc Lamm hybrid amps sound MUCH better with my Sashas."

You probably mean under "pure wattage" the tms power at 7/5 Ohm load given as specs. Yes, in this case you are absolutely right. When I say power I really mean peak power or headroom with as low level of distortions as possible.
Probably the peak power as well as amount of current delivered by your LAMM added substantially to the magic of this amplifier as compared to your previous one, McIntosh 400

Correction: I meant above 8/4 Ohms load and power in "rms"
My apologies for typo errors

The 4th time I heard Wilson Sashas, it was with a Perreaux integrated and it sounded better than the previous 3 auditions (although there were more variables than just the electronics).

My point is, the combo sounded very good to my ears.

Keithr: The darTZeel integrated is stable into 2 Ohm loads and outputs 450 watts into this impedance. The power supplies on it are very stiff, which should come as no surprise given its considerable cost (I think the integrated is now something like $25,000). The issue isn't whether the darTZeel will drive a speaker like the Sasha, which it will, easily, but whether a speaker like the Sasha, which is well-made and does some things very well, but is not state-of-the-art, should be paired with extreme cutting-edge electronics like darTZeel (there are a lot of people running Wilsons with darTZeel who are extremely happy, but they don't know what their integrated is fully capable of).

I don't know about the integrated---just going back from memory on the stereo amp, in which multiple reviews said lower impedances weren't its thing (I believe Mike Lavigne told me that as well a long time ago). That would lead me to hesitate on spending 20k on their integrated to run on Sashas (which I've heard numerous times and like power imo)

I believe Jeff Dorgay had a Dart run out of steam on Logan CLXs---which could be a more difficult load.

btw- JTinn is the distributor for Dart and he should have disclosed that.