Cube Audio Nenuphar Single Driver Speaker (10 inch) TQWT Enclosure

"There are trade-offs with either approach. Matching YOUR needs and preferences should take priority".

Agree 100% David.
With this speaker I'd prefer tubes (I just like what tubes do). However no question that there has been much success reported by  those who have chosen solid state amplifiers. Superb outcomes are possible with either. 
Charles 

@sim_audio_nerd, 
I've never owned the Coincident "Victory" models but have the Coincident  Total Eclipse II and love them. If I were to change speakers the Nenuphars would be high on a very short list.  I don't believe that you'll have any regrets if you acquire them.
Charles 

For those who like to build things (or have someone build something for you)......buying the Cube drivers and mounting them on an open baffle will give you considerably better sound (not as deep of bass)....if done correctly. An open baffle will allow a more "open" sound. An example"

four foot high baffle
2 foot wide baffle
2 wings, one foot by 4 feet going straight back
You mount the driver about one foot or so from the top of the panel.
This will probably give you flat to 40 hz in room.
All baffles made from at least 3 layers of three quarter inch different woods to kill resonances....for instance, a combo of bamboo, baltic birch and highly refined MDF......

The serious magic comes from how you hook it up. The stock Nenuphar has a binding post on the outside....then a wire going to a banana plug that plugs into the banana jack on the speaker driver. All of these things veil the sound. What you do is SOLDER some really good speaker wire directly to the voice coil wire where it attaches to the banana jack.....the other end the the speaker wire attaches to your amp. This will blow your mind. Of course, you could do this same tweak with a Nenuphar but how many people are going to remove the driver and hardwire a cable and remove the binding posts and run the wire through the vacated binding post holes? Any takers?...he he. I am saying, you have never heard what this driver is capable of by having all that stuff in the signal path that you do not need and veils the sound.

There are only about 5 percent of audiophiles that are DIYers.....and most DIYers are cheapskats......he he. So, I don’t expect much from this post other than letting you know what the possibilities are. Maybe, some day, someone will find out how much magic is in this driver......Will it be you? The cost of the drivers and wood and wire would be $10K......much less than the Nenuphar. And you could always mount the driver in a small box and use it down the road in your bedroom or van....he he.

Of course, you could add powered or passive woofers to the open baffle Cubes and get all the slam you ever wanted. If you did this you could cut off some of the bass from the Cube driver by putting a tiny cap in front of the main amp or by changing the coupling cap in a tube amp to a lower value that would limit the lows going to the driver. You would get cleaner sound and have more mid bass impact by running your woofs up to at least 100hz.

Enjoy this moment!.....it is magic. I has always been magic....Blessings to all.

Where are you getting this price on the Nenuphar's? MSRP??  I got mine in the "8's with a Custom Paint Job to boot.

Have you actually heard this "magic speaker" you have concocted above?? Didnt think so....All Theory with no actual experience. Not to mention it would be as ugly as hell even if it did work.

The standard Cube Nenuphar retails for $15.9K......as far as I can see.  The drivers list for 6690 Euros ($8176 USD) the pair plus shipping and duty.  The mini retails for $12.0K.

I have done all these mods to various speakers for at least 30 years.  The mods would do exactly the same with this speaker.

What you think is ugly, is someone else's beauty.  Want to see some cool looking open baffle speakers?...check these out:

 https://www.youtube.com/watch?v=CfgEbVxt4AA&t=328s

You could mount the drivers on a one foot wide baffle and install woofers underneath to fill in under 250hz.....then the speaker is just one foot wide and no wings.  You could finish it any way you like.  Infinite possibilities if your mind and heart are open.

Are we having fun?  If not, try something else.  Serving others brings joy to everyone.  Who are you serving by your thoughts, words, feelings and deeds?