I've bought a few Blu Ray Pure Audio discs, all classical at this point. They do sound great, but I'm mostly running them through my Audyssey'd HT rig which downsamples to 24/48. I've switched back and forth between the full resolution version (analog outs from oppo bdp-95) and the Audyssey'd version (hdmi out to my humble denon AVR-2112CI receiver) and I like the Audssey'd version better.
Bottom line is, just like any "new" format, its the mixing/mastering that counts more than the hi-rezness, IMO.
This whole room correction thing has been a real revelation to me. I'd never been able to get my HT to produce audiophile quality sound, particularly because the subwoofer was so out of control. Audyssey gets that in check. Its not completely monodirectional, but its surprisingly how little I'm thinking "the bass is coming from there". Usually it feels like its right in front of me. And the phantom center is perfect.
Way off topic I know. I just like Audyssey and wanted to share.