I agree with @lalitk that a well mastered recording in any format would sound excellent.
It would be fair to compare the same master recording amongst all formats and come to your own conclusion as to how your money would be next well spent. Once you have concluded what is best for your system and your ears, you will be vindicated by your next purchase of cd's or streaming service.
This hobby is indeed a journey of discovery of what works best for you. And there can be no regrets for your streaming needs as the W20SE is indeed a top-notch streamer in its own right. So, you already have the best of both worlds in your system but only with the best masters.

