While I did not enjoy the Kef R900 or LS50, a LOT of people really like them. Since the actual store has them at the same price as online stores is a bonus. You may be able to do some negotiations for centre and surround channels.
German company Canton is basically Germany's Bowers and Wilkins. They are extremely well-made and are considered very neutral. There are a number of front-ported speakers from them, IIRC.
The down-ported Wharfedales may be good for your room, as you don't have much room for your speakers. I would do what I can to bring them out into the room a bit - at lease bring the baffle forward of your entertainment stand.
Whatever speakers you end up getting (if any), I would suggest a subwoofer or two for your room. In the USA and, to a lesser extent, Canada, we have access to a number of subwoofer-specific companies. For your room, I would suggest a pair of 12" ported or sealed subs. In Europe, your choices are limited.
If Polk or Klipsch are available, the Polk HTS 12: https://www.amazon.de/Polk-HTS-12-Su...rds=hts&sr=8-3
and the Klipsch R112-SW https://www.amazon.de/Klipsch-R-112S...0321274&sr=8-3
would be your best bet from Amazon.de.
BK Electronics in the UK ships throughout the EU, and probably build the best subwoofers in Europe. A pair of these: http://www.bkelec.com/HiFi/Sub_Woofe...20P12-300SB_PR
would work beautifully in your room, once they can get their supply chain in order post-COVID.
As an aside, the shop that sells "Amphion, JM Reynaud, Pylon Audio and Triangle" sounds like a VERY nice shop. All those companies make some extraordinary speakers.