I received my artbook set yesterday. I am not up to speed on the different releases, but what I got is a 12" x 12" harbound book, and two CDs, a DVD, and a Bluray are snapped into the front cover. Quite nice, and it is much more than I was expecting. I was expecting a Digipack sized package with the 4 discs. I am in the US and originally order through Amazing. I was confused that it hadn't shipped as of release day, so I cancelled, but ended up re-ordering. It came from Amazon EU, shipped DHL.
I am only just now listening to the 5.1 track, ripped from the Bluray and converted to multi-channel FLAC. On my very modest computer setup, the mix sounds different; more discrete. But I want to reserve any judgement, good or bad, until I have a chance to listen to the hi-res stereo mix on my headphones, then the 5.1 mix on the home surround setup.