Which High Res releases are worth buying?

I concur; the Sound Liaison downloads are all you could ask for in an audiophile recording. Very beautiful music and incredible recording quality.
And the service of this little label is unsurpassed.
I maid a stupid mistake when I was going to play back the one of the files and had already sent a complaint to Sound Liaison before I discovered that it was entirely my own fault that the download was not playing. Before I had the chance to send a second mail saying ''problem solved'' I received a wetransfer file with all the tracks I had just bought from head engineer Frans de Rond with a note asking not to hesitate to take up contact if the problem was still there.
That kind of service is truly remarkable.

Paul Simon's Graceland is outstanding.

I’ll share, do NOT buy Wilder Mind, from Mumford and Sons, it sounds atrocious.  

I’ve purchased quite a few titles from HD Tracks:  anything from Pearl Jam has been great, Led Zepplin, Muse, John Mayer, the Otis Redding Complete Studio Collection is great.  Pet Sounds sounds pretty epic.  I believe someone else mentioned Muddy Water’s Folksinger, that sounds really, really good.  Obvious choices, Miles Davis and John Coltrane sound great as well.