I've got a bunch of songs for this exact purpose, Glen. Infact I've been listening to music every single night when I sleep for many years now.
Unfortunatly, I'm not at home and my memory stinks, so heres a few names off the top of my head. Give me a method to send you something and I can send you some samples.
Merlin's Magic - Heart of Raeki (sp)
Mu-Ziq - Goodbye, Goodbye
Orbital
Ocean song (completely anonymous song that I have yet to find the author to)
A bunch of others that I'm blanking on