In terms of the mix quality, you should consider:
1) Lizard (the title track is exceptional, that's how I started with surround sound. In the Bolero part, you'll hear a jazz band playing around you, it's simply amazing! Keith Tippett, Robin Miller, Mark Charig, Nick Evans... there wasn't enough breath on the stereo mix for these guys...);
2) Larks's tongues in aspic (when the guitar kicks in, after the first couple of minutes you'll understand you are going to experience something magic. This is a great surround mix of an album that wasn't originally recorded so well);
3) Thrak (what's better than two drums, two guitars and two bass players for experimenting with surround sound? One drum on the rear speakers, the second drum in the front speakers - both in stereo - and that's the logic of this mix. There's a bit of revisionism on Walking on Air and an alternate vocal take on Inner Garden, not enough to be picky. I love it).