Hell, I have a whole playlist that plays every night that helps me sleep.
As far as ReMixes go, the one that stands out in my mind is 'Kizukaseru' by Unipulator. http://www.ocremix.org/remix/OCR00903/
However, I find that most of the music in my playlist comes from various Cafe Del Mar albums I've found. Very relaxing stuff. Also, I have the .hack//Sign OST, Mindi Abair, Grover Washington Jr., some Candi Dulfer (I like saxophone music), and some music from an album I found using StumbleUpon (http://www.lunarmusic.net/).