Literally, almost anything on the ECM jazz and new music label!
Beginning with avant-garde jazz, but evolving into producing music that can most probably called "chamber-jazz", the vast majority of recordings on this label are excellent.
Their original vinyl recordings are some of the best, but they also made the transition to digital very well.
Universally they have an open soundstage, percussion is recorded extremely well, attack/decay is well defined, detail overall is excellent. Quite natural sounding overall.
Artists worth checking out: Ralph Towner, Rubisa Patrol, Gallery, Craig Taborn, Michael Formanek, Avashai Cohen (trumpet), Keith Jarrett, Julia Hülsmann, Eberhard Weber, Tord Gustavson, many more.
They seem to continually find, excellent new musicians, with great chops, and their own unique voice.
And lastly, the label has always appealed to audiophiles, due to their quality, so used copies on vinyl seem to be in great condition. And widely available for under $10.