suggestions:
get recommendations from 2-3 other decent high end hifi dealers for equipment - be sure to get them to come see your room, and suggest treatments if needed - equipment proposals should reflect the room in which they will be used, and the best dealers don’t just sell components, they deliver superb sound in the customer’s room
the equipment suggestions made by the one dealer is suspect imho... sony server, mac ss amp with autoformer, paradigm speakers... none would be in my top 8-10 candidates for great all around sound in a reasonable room for your stated budget
hear as many speakers as you can, get a sense of what type of sound you like (sharply detailed crystal clear ... or warmer less detailed more natural ... snappy with rhythmic bass, and so on)
of the brands mentioned, i personally would lean towards vandersteen, sonus faber, magnepan (understand the special placement demands of this special speaker), potentially harbeths devores proacs in your price range ... i personally favor sound that is not hyper detailed, with some warmth and body, especially in presenting vocals, solid but unobtrusive bass - this to me is much more listenable over long stretches, sounds great with many kinds of music, sounds more like real (acoustic) musical performance
then electronics follow from speaker chosen