There is absolutely no difference in quality between WAV and FLAC compression. And FLACs have better tagging support. Although disk space is cheap now…
SQ from Qobuz (or even Tidal) is the same as if you had the same CD at home (of course it is sometimes difficult to figure out which master they are using).
Still, not sure why pay for a full-featured streamer if you are not using any of the streaming capabilities; there are identical stand-alone DACs for significantly less because tghey do not have any of the streaming stuff.
Still, for Rose specifically, just connect it to the network and it will tell you if there is an update…