There's some excellent trancey/world stuff out there that probably's got enough beat in it to keep you happy but a bit more mellow to help you zone out there. Here are a few suggestions (some of my faves)

Steam (Hamam) - Soundtrack (this has got a heap of stuff in it built around Sufi trance rhythms, it's the most amazing thing)
Baraka - Soundtrack
Anything of the CDs by Dead can Dance or Lisa Gerrard's later albums
There are a lot of 'coming down' collections with really mellow grooves (ie I've got a Sunday morning coming down compilation)

Hope a few of these help!