Any NAS will do. If you are going to invest in any audiophile server product, I’d suggest setting up a Roon on an old computer or a dedicated Intel NUC.This is so far the best recommendation for our needs. I have checked the manual of this streamers and it looks like playing music from hard drives isn't its the main focus (maybe for occasional use).
One other option could be Auralic Altair G1 - server, preamp, dac, streamer, headphone amp.
What servers (remote controlled, screen, Qobuz) to look at, if I want to go that route?
btw, I have two Cambridge streamers, and their streaming software is by far the best. It works as a Roon, Chromecast, Airplay, DLNA, and blutooth endpoint. Anybody with a smartphone and on your wifi can easily play whatever they like from any streaming service.
I used to use a NAS and Minimserver, which is terrific, once installed. Now my collection is still on the NAS but the Roon server catalogues it, integrates it with my Tidal and Qobuz subscriptions, and plays it to multiple endpoints - Roon ready and Chromecast (including a Cambridge streamer). Controlled from any smartphone, computer, or tablet in the house. Roon controls the volume on the Cambridge Audio (and a pair of KEF LS50s).