Thanks for the updated details on the room and it is a good idea to consult with Gik. Are there drapes for the windows? It is possible with that ceiling height and configuration that it will need some treatment as well as the walls. Anyway, as Blisshifi said, start with getting the room right and work on from there. It is better to sort the room out before auditioning equipment. For example, in an untreated room, current B&W's will likely sound too bright.
The other observation I would make is to not let the comically large couch dictate your listening position. There's a temptation in a large room to want to use the space and to position speakers too far apart and to listen from too far away.