Jellyfish in Space by Kevin MacLeod
This is somewhat relaxing, while still having some forward momentum. Kind of like sleeping on a train... or taking MBA classes. I like the spinney-sounding synths. The chorus effects give this piece a watery feel. Kind of like a shimmering pond... or being on hold for an insurance company run by sperm whales. You can download this in uncompressed format here. Download comes with individual tracks so you can make your own mixes.