What speaker do you passionately want to demo?

Beyond the slight curiosity of what speaker you'd "like" to demo (example: every Klipsch horn speaker), what speaker(s) would you "passionately" love to demo?  A brief explanation of "why" you like these speakers would be beneficial.

I'll start:

MBL 101 X-treme - almost a decade and reviewers still say it's amongst the best they'd ever heard.  Probably should be matched to the MBL Electronics

Living Voice Vox Olympian Horn - it's wood (maybe sounds more warm/organic), it's a horn, and it consistently gets good reviews at the Munich High End audio shows.

Muraudio SP1 - Electrostatic + cone hybrid speaker that received many rave reviews.  It's not an easy task successfully marrying the fast electrostatic to the slower cone to sound seamless.  This speaker was on my short list to purchase.

Voxativ AC-XP field coil driver - both Voxative and Pure Audio Project speaker offer the Voxativ AC-XP field coil driver as an optional upgrade, but it's an additional ~$7k (yow).  The reviews leads me to believe that this field core driver is sonically "significantly" superior above other choices.  

Mike Lavigne's Evolution Acoustics MM7 in his dedicated sound room.  The sonics of demoing speakers at storefronts or audio shows can be problematic depending on the audio chain and the room setup.  MikeL has a matured optimized setup that is sonically recognized as excellent by other serious audiophiles.  
New KLH-5
A treasured memory of heyday KLH driven by large McTubes...and never quite sold on ports and plugs.
Alsyvox Botticelli’s

heard them briefly in a massive room at 2019 RMAF. They filled that room completely. Magneplanar design but with grunt guts and extended bass. Like Maggies on steroids. 
There are more prodigious concerns in the works, but here's a little aside just for the fun of it. 

I wanted to hear the 3" soft dome midrange sound in my room again - so I bought one, well, actually a pair. I had reviewed the reasonable Wharfedale Opus 2 M2 Bookshelf Speakers for Dagogo.com a while back. That soft 3" mid was SO beguiling, I almost bought them. I have thought a lot about that midrange performance over the years. Every so often I look to see... 

YES! Pair for sale here, GONE! To me! My condolences to the two "watchers"; I came, I saw, I bought...     :) 

This will not rock my world, but it will be fun! I envision doing up a rig with DAC direct using Schroeder Method of IC Placement to Legacy Audio i.V4 Ultra Amp, and doubling speaker cables to the M2. I consider the 3" soft dome among the most desirable attributes of the PMC and ATC lines. So, Im going after it on the cheap, as a side joyride. I will put them with the Legacy XTREME XD Subs. Good fun. I want to see how far I can take the 3" mid in comparison to others. I never got to fully realize its potential back then, so I'm having another run at it.  :) 

I sure love that soft dome in my ATC SCM100ASLT speakers. I look forward to the results of your fun experiment.