My experiences with Harbeth I own.
P3ESR SE: €2.000
elevated bass with boom and starts distortion at higher spl. No balanced FR in-room
C7ES-3: (€2.600)
Boomy bass and not dynamic with limited high frequencies. no balanced FR in-room
SHL5+ 40 An: (€5.500)
more dynamic and better bass than C7.
Tricky with positioning, narrow sweet spot and the high frequencies (poor off-axis performance?) can be nasty. no balanced FR in-room.
Marketing gimmicks such as WBT binding posts and ‚better inner wiring‘ , new veneer (walnut).
WBT and wiring has no benefit to the sound. The veneer was not exclusive for the Anniversary.
In general the SHL5+ has bi-wiring only for marketing, also the super-tweeter is marketing BS (Alan Shaw said)…
With none of my Harbeth I am totally happy because each has its flaws.
I used very different amps, +100W SS, +100W Hypex Class D, +100W Hybrids, 50W tube amp.
And because of the price I can’t recommend.
Just my experiences.
P3 ESR - main thing is the need for free space to balance the bass, which to me isn't elevated when used that way.
C7-ES3 - I've already said I hated the bloody things in a UK brick and plaster kind of room. C7-XD is NOT like this. Now sounds more like the 5+-XD which to me does seem a little more transparent than the standard Plus version although I've no direct proof of this.
Anniversary was done for that reason alone and it shook AS how well they continued to sell with their funny veneers and bling sockets and so on (the 'better' caps were initially also for marketing reasons but all who compared 'claimed' to hear improvements). He turned on his now ex sales manager for under-estimating the business potential I remember.
Buy-Wiring was a fad from twenty to thirty years back and done to follow fashion. The speakers were well enough behaved not to need it.
The important thing here is, their market LOVED the anniversary models at their higher prices (exclusivity) and to ensure no lack of future sales, the XD models are higher again. What's happened? - continued full order books going forward and praise from owners on the new models..
Look, I accept that for many here, it's money for old rope. I for one don't like the looks of multi-driver tower speakers with bling all round them to set them apart. Dynaudio and Focal are technical level competitors here in the UK (wish PMC was but it isn't) and both these brands, Dynaudio especially in their popular ranges, set the prices high in the UK as well, so we're screwed if we're not well off new retirees (the age group who buy them generally).. As for the rest of us, Amir has tested a huge number of cheaper boxes and some of them perform very well indeed, so I'd suggest leaving Harbeth to their appreciative captive audience and moving on frankly.
Interesting, no mention of Spendor these days. It'll be interesting to see how they do now their main designer's gone.