I'll give those 3 a whirl as well. I have already listened to Mezzanine. Where are you seeing Mezzanine available in surround?Massive Attack's Mezzanine is the only album I can think of that's in the same genre and available in surround format. If you're looking for similar albums that are in stereo, just look for late 90's or early 2000's "trip-hop". Some examples:
DJ Shadow - Entroducing
Stereolab - Dots and Loops
Herbaliser - Blow Your Headphones