Favourite ECM Titles

Pat Metheny Group – Travels
Steve Tibbetts - Yr
Keith Jarrett - Koln Concert
Peter Erskine - Time Being
Gary Burton - Crystal Silence

Wonderful, Argyro, hope to get valuable information from this thread myself. My favourites off the top of my head:

Jarrett, Peacock, DeJohnette - "Whisper Not"
Jarrett, Peacock, DeJohnette - "My Foolish Heart"
Arve Henriksen - "Cartography"
Miroslav Vitous - "Universal Syncopations"

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I've drawn this nice little line since I know I'm deviating (profuse apologies), but everyone into this kind of music should also keep an eye on ACT Music and PIROUT. My favourites there:
e.s.t. - "Leucocyte" (ACT)
Rössler, Vogt, Vitous - "Between the Times" (ACT)
Copland, Peacock - "Insight" (Pirouet)
Jürgen Friedrich - "Pollock" (Pirouet)

One of my most favorite labels:
Arvo Part: Tabula Rasa, Arbos
Steve Reich: Music for a large ensemble, Music for 18 musicians
Colin Walcott: Cloud dance
Jack DeJonette: Special edition (the first one only)

Nik Bärtsch's Ronin-Holon
Tomasz Stanko Quartet-Suspended Night
Steve Reich-Music for 18 Musicians
Ketil Bjornstad & David Darling-Epigraphs
All of Tord Gustavsen's albums are a must with Being There being my favorite
Keith Jarrett-The Koln Concert
Terje Rypdal-Rarum VII is a good place to start since it has cuts from various points in his career. Great guitar work.
Tons more but those are the first releases that jump out at me.