Posting again here to add a few more CDs that have been of benefit to my explorations (wow, my last list is from 2013, how time flies!)
Hemi-Sync - Exploring Other Lives - Haven't used it often, but has helped me with uncovering some of the more traumatic moments from a few lives. It's good for giving you time to relax and space to experience. Not too leading.
Benjamin Iobst - Seven Metals - Simple, but beautiful, audio of various Tibetan singing bowls, wind chimes, gongs etc. Very nice for unguided exploration.
Nadaka - Lotus of the Quiet Mind - downloaded this as a nigh-quality FLAC file, and the quality shows!
One thing I would recommend is, if possible, getting a CD of an audio, rather than an MP3. MP3 is a compressed file format, so a lot of the audio waves are lost, and at least for me, this results in a poor meditation experience. I'm not sure what is lost in the compression from WAV or FLAC to MP3, but my energy system is not awakened at all with an MP3.