Speakers for Lamm ML2.1

Rumney510: The Von Schweikert VR-9SE is a speaker that would easily be driven by ML2.1's. We have had lower power on them in a slightly larger room and they were easily driven to levels we would never listen to. They have a 96db sensitivity and the built in subwoofer is powered by a 1000 watt amplifier. They would be an incredibly easy load for the LAMM's.

Especially in a room such as yours, the VR-9SE's with their adjustability with the integrated powered subwoofer, gain controls for the tweeters and super tweeter make them a speaker you should strongly consider. The speaker is remarkable and works anywhere.

As the distributor for the VSA elite line, I would be happy to direct you to a place for audition.

Raquel: Very funny! I just re-read your post! :)

(it seems) ...Lamm loads his output stage to push up the harmonics

Strange, why would they do this??
If this were indeed the case, then full-range drivers' characteristics would be indicated (Lowther, Fostex Supravox type), ideally their 16ohm versions.
Wright also notes: Find a loudspeaker that would be fine “as is” and then let ML2 to do with it whatever it could.
I agree. Moreover, at a possible 50k investment you are certainly entitled to outstanding transducers! Cheers

Romy , did you ever hear an ALE P series compression drivers system together with ML2 ? You should , it will make you smile happily for the first time in your last ten years :)
Zanden combo and room treatment help a lot as well.
The thing is speakers are more critical than amps ( just found out that - as an amp freak - after buying 3 dozens of "ultra" high end amps and "only" one dozen of speakers, all for research & pleasure purposes)

For 50K, you could buy Jtinn's used Kharma midi exquisite (originally bought by Tenor Audio) and buy a new Kharma ceramique sub to go with it. Valin called this the best stereo system in combination with your Lamm ML2.1.