I’ve heard a lot of expensive systems at shows and most of them left me feeling meh. Among them the original, snail shell B&W Nautiulus driven by stacks of Krell amplifiers and crossovers.
In terms of exceptionally good sounding and too rich for my blood was the top of the line Vandersteen speakers driven by their own amplifier and a CAT preamp.
I’ve heard the CAT in a different environment at Magico and was also really impressed by it. I wish I could have one for a long term review.
Also, and not necessarily very expensive was the Snell A/III driven by Tandberg amps. Wow. Among the very best systems designed for a living room. The Tandberg amps may not be as smooth by today's standards but they did justice to the Snell's bass cabinet in a way few other amps could do then.