Differences between Harbeth, Spendor, Graham, etc. ?

Robert Greene and Paul Seydor have reviewed many of the various BBC incarnations over the years and they include some comparisons between the revisions in the same lineup and similar models across brands. I own a pair of Grahams and found them to have greater clarity than their Harbeth counterpart with no downside. I haven’t heard any Spendors in a long time.

Interesting to read these answers -- which to mean anything, must presume decent room acoustics. In a room with bad acoustics, none of the differences listed here amount to anything. Might as well ask about the different tastes of pork, beef, and chicken when they're all covered in ketchup.

I know nothing about these speakers but I know your home is gorgeous!

Apologies to the OP if this post takes the thread astray, but I am in a similar situation.  Currently have Spendor SP3/5r2 in a small room,  running them with a modded Gan1.   I will be setting up a slightly larger room tthis summer and want to stay with the British sound.  Thinking perhaps of Harbeth 30.something or C7es3.  At Axpona one room was using some Spendor Classics (I don't remember which).  That was a sweet sound.  Unfortunately the Spendor Classics are quite pricey in comparison to the Harbeths. 

By the way,  the OP may want to give a listen to some of the Gan amps with these speakers.  In my limited experience (Gan1 and Spendor SP3/5r2) I would describe the sound as effortless, non-fatiguing detail.  Insightful, perhaps understated, but very pleasing.  It draws one in such that I am reluctant to end a listening session.  I haven't tested this, but I suspect that the nature of the Gan amps is to enhance the sound signature of such speakers.  Just my 2 cents.  Best of luck.

"as I suspected. I’d prefer to stick with SS."

@stuartk FYI: Alan Shaw the owner and designer of Harbeth uses Hegel solid state at many of the HIFI shows. BTW, my friend runs solid state with his Harbeth M30s. Good luck with your search!