I am new to the Hi Rez format and only own a few discs. I Purchased the REM greatest hits DVDA and was fairly impressed. The sound is great, I feel the surrounds could have been a little more spectacular, but overall, good. I will list my discs and give a grade beside it. I am looking to add the one disc you all feel is a must own. I like all kinds of music and want somthing to demo to friends. Let me know. Beach Boys (Pet Sounds)DVDA A- The Boyz have never sounded so good, and it is amazing what a 40 year old disc can sound like. Overture of 1812 (Telarc)SACD A The cannon blasts are frightning on my PB2+ at reference level. Queen (The Game)DVDA A This disc is amazing, I can't imaging a record of this age sounding any better, other than the next one Pink Floyd (Dark side of Moon) SACD A+ This disc was made for Hi Rez. GET IT!! REM (The Hits)DVDA B Sounds good, but I think a little more aggressive mix would have boosted this to an A.