Diamond Mine, by King Creosote and Jon Hopkins,
Julianna Barwick, The Magic Place.
They sound much better, one after the other, in that order. I will file them together on my shelf, once they leave my living room, and break my usual habit of alphabetizing.
I also like to follow Mahler symphonies with a short Mozart piano piece, in a major key preferably.
Can you think of other sensible combinations of music or CD sequences?