I love the first 3 tracks from the 1957 album Drum Suite. It will help you zone out or lock in. One Discogs user noted that the way it's recorded makes it feel like the musicians are in the room with you. This would sound great on some fancy speakers.
Any Bill Evans Trio album, particularly LIVE AT THE VILLAGE VANGUARD.
Floating Points albums including his remarkable collaboration of Pharaoh Sanders.
Dawn of MIDI if you want something a little more angular and abstract.