Actually, (probably from sheer boredom), I've been going through each of my CD's at home and trying to find the ones with the best sound quality. About the only thing I've discovered, (which probably is nothing new to most/all of you) is that the older the recording the worse the quality. I've only gone through about 1/4th of my collection so far, listening to about 30 secs of the beginning of each song.

Here's a list of some of the best sounding CD's in my collection, so far:
La Sandunga by Lila Downs 2004
Border by Lila Downs 2002
She Wolf by Shakira 2009
Live at Mile High Music Festival by Dave Matthews Band 2008
From this moment On by Diana Krall 2009
The Fall by Nora Jones 2009
The Essential Neil Diamond (disk 2 only) 2001