Advice and help understanding, choosing a Widebander / Single Full Range Driver speaker?


I'm considering a second set of speakers for my primary system.

I'm satisfied and very happy with my current primary speakers (Tekton Design SEs), so this isn't about a replacement speaker, but I have been looking for something that is different enough from my Tektons, in terms of speaker type and design, etc.

My current top choices being Sound Labs or Cube Audio. Horns, maybe.

Srajan Ebaen's review of the Bliss C a year ago was what first exposed me to Cube Audio and his more recent review of the Nenuphar is stellar. Both reviews are copied in my follow-up post below.

I've been 'somewhat' exposed to full range drivers (or nearly so, with augmentation) as I've owned Zu Audio and Vaughn Loudspeakers and have been exposed to Teresonic speakers and Voxativ drivers. Still, I'm a neophyte with regards to this speaker type (single full-range driver).

Would love to learn more about the pros and cons of owning a true wide-bander and issues, pitfalls, etc. I should consider before moving forward.

Leaving this very general and open. Let's keep budget out of this also (I don't want to complicate the discussion). 

More on my system and room and preferences in subsequent posts.

Thanks!

(BTW - I did search the forums and there is 1 wide bander thread and 6 full range driver threads. None apply directly, but I will review each to see what I can pull out that may be relevant).
david_ten
@exlibris   I now have over 550 hours on the Nenuphars and they are stunning, within the context of my system. 

Placement and some system related changes / improvements have helped enhance performance. I'll be moving from JJ to EML (SP) tubes for the Found-Music 2A3 monoblocks, by the end of the week. Other system level applications are also breaking in. 

I'll start a dedicated thread, in a few weeks, once the system is settled.

Thanks to all for your help prior to, and along the journey. 
When you audition be sure to not let the person doing the demo restrict the type of music used. Put these single driver speakers through their paces with complex passages and music with wide dynamic swings. Dont be afraid to consider higher powered SET amps (8W plus). 
Don[']t be afraid to consider higher powered SET amps (8W plus)

OR lower powered SET amps... If you have a high quality amp paired with a preamp with sufficient gain.
[don’t] restrict the type of music used

I’ve been running Club music for the past few hours, at high volumes for me (Avg SPL at listening position High 80s to ~ 90db)

Armin van Buuren, Kraftwerk, Biosphere, Jes, Amon Tobin, Primal Scream, The Orb, Massive Attack, Tricky/Martina, etc.

System was tested with Opeth, Deadmau5, Egyptrixx, etc. : )