Is there Tannoy Magic / Should I buy a pair of Tannoys as "accessory" speaker?

I have a decent system, and am running JBL 4367, with either Parasound A21+  (300w solid state) or Canary M600 (50w tubes) and am Tannoy-curious. 

I'm familiar with the current state of the brand, I understand that the "new" speakers aren't made at the old factory, and that much of the "shine" has worn off the brand over the last several years.  I'm also aware of the newer company with much of the former Tannoy brain trust.

I have never heard a Tannoy speaker.

My room is just barely, small, at 16' wide 13' deep and 9' ceilings.  It opens at the rear, almost but not perfectly symmetrically, behind the listening position, via a set of pocket doors that remain open, to a much larger room.  The JBLs, with their 15" driver (thanks to a bunch of acoustic treatments) are not "too much" for the room, so I don't know that the Ardens (for example) would be, either.

I'm not saying I wouldn't get rid of the JBLs, but the plan is to buy a set of Tannoys, hopefully like them enough to keep them, and slip them in the system as desire dictates.

The JBLs do everything that I know of, that I want a speaker to do, I'm just looking to be inspired.

I think I need realistic bass, and so perhaps a 12" or 15" (I don't know, just guessing) model might suit me better.  

Other than figure out how to demo some Tannoy speakers in a store like a normal person would, what do you think I should do?