I had them before my twenty5 23's and they are fantastic. Id avoid KEf R500/700 which are good for scale but nowhere near as good dynamically as PMC. But not just being brand loyal, how about these Neat speakers.
These are exactly the type of speaker you want to buy. They are brand new, of a reputed brand, and £800 off the original price. They have obviously come to the end of the line, unlike the pmc twenty 23 (which are still made by PMC, only in ash finish for £2170) but if you can pick a model like this neat, despite being a few years old, I suspect it would easily trounce something like a Tannoy XT8F for £1400 in Richer Sounds.
What the dealers are doing is buying them up in bulk when the model comes to end of line. Lintone audio did that with PMC 20-23s and were selling them for £1500, £900 off RRP. Clearly Fanthorpes have done that with the black ones as they were £2400 too.
https://www.fanthorpes.co.uk/speakers/floorstanding-speakers/neat-elite-sx-speakers/
My advice would be to demo speakers around £2000-£2400 (as thats the type you will be buying with a discount and it will give you an idea for how bargains perform albeit you wont be spending anywhere near £2400 ) as if you are patient you can easily get them nearer £1500 and £1600 with deals, dealer discounts etc. There are so many people who just go to richer sounds and hand the cash over and its deeply frustrating what the opportunity cost of this is (in buying a much better speaker). Most dealers are already on large margins and if you went to someone who sells something like a DT8, I reckon you could easily get £250 off with the right dealer, which might tempt you to spend a little more. So its totally wrong to discount a speaker just because its out of budget. But even if you are strict with budget you could get something like a £2400 speaker for £1500/1600 as with PMC's.
Depends too how patient you are with when you want them, but take your time, youd get a fantastic speakers. If any local dealer has the SX speakers running them off stock (and probably selling for their RRP) you could always just try in your local dealer first. TBH Id shortlist all the best reviewed speakers at around £2000 then go from there, as where there is a will there is a way. If you listend to the DT8 and then find the SX is better, and saving money, well job done.
Please buy smart and happy to help you further. Cheers.