the best, cost-no-object, music streamer?

There are a lot of ways to architect a network based system . The term "streaming" is no used consistently. The weiss MAN201 supports streaming (i.e. plays music files coming in over ethernet). The PS Audio Perfectwave bridge does as well.

However, any music server (such as the Bryston BPD 2) that can access data stored on a NAS is not technically streaming, but for practical purposes this makes little difference.

The options are many, and there are an increasing numbers of the high end guys offering very expensive and presumably good systems.

The latest edition of the Linn Klimax DS!

The Sooloos is an extensible system including storage,
distribution and rendering. You can get all three in one box
(controlled by an iPad app) or you can get a multiple zone,
multiple storage system with multiple dedicated touch-screen
controllers.

Hi,

IMO: the Ayon Audio S-5 Network Player.

Best regards,

You can't get better than the latest edition Linn Klimax DS streamer.