Assuming we are talking about stuff available new, Bluesound stuff is excellent and being available at £399 currently, that has everything under £1k covered for me, in fact, if it’s a stand-alone streaming source you’re after rather than something with amplification integrated, it’s probably my only choice (maybe Auralic too), since it seems Linn have dropped their stand-alone DS units in favour of DSM systems.
If you have a big budget and want something fully integrated then Linn become of interest again. Their DS platform is extremely dependable and flexible and my next major upgrade is probably going to be an Akurate or even Klimax level DSM and Exaktbox crossover/DAC... but that is a LOT of money.
In all honesty, what I’d probably do (well did do) if spending over £1k on a streaming source, is buy a Linn Klimax Renew DS, it has proper Spotify/Qobuz/Tidal integration which works a treat and it just sounds phenomenal.