What is the VERY BEST CD album you've ever heard?

A 1990 CD by the Music & Arts label called Glenn Gould - Previously Unreleased Performances of Works by J.S. Bach, 1957-1969.
This is a tough CD to find. I lucked out. It’s on YouTube. There’s also a live performance on YouTube of his unbelievable performance/conducting of Cantata No. 54.

It’s a favorite because it’s so hard to find, is not available in any media other than YouTube and contains such incredible music.

There is a version of the Soundtrack to David Lynch’s Mulholland Drive on multiple formats (the vinyl pressing goes for $400-$700 presently on Discogs) but the CD is great if for the sole reason it a) doesn’t cost $500, and b) has Rebekah Del Rio’s performance of “Llorando” (an a cappella Spanish version of Roy Orbison’s ‘Crying’) which may be the greatest vocal performance I’ve ever heard.

I can’t help but laugh when people make these delineations within pop music.  
It’s ALL POP.  
If it ain’t classical or jazz, it’s just a particular shade of pop.  
It was Perry Como, Rosemary Clooney, etc.  

Then Elvis, Chuck Berry, Little Richard, Jerry Lee Lewis, etc.  

That pretty much did it.  
Everything we’ve enjoyed in pop the last 60+ years has been an offshoot of that “Rock and Roll Big Bang.” 
It’s ALL POP.  
Popular. Hence the abbreviation.

@mrmeaner Once again, as we see in this thread here, someone made a fuss about calling the Beatles, “rock.” Who cares? We all know the Beatles. Nothing bad is going to happen, no egregious misappropriation occurs if someone calls the Beatles “rock,” or “pop,” or whatever. It’s all madeup label malarkey anyway. It’s all pop.  
Yes, everything in popular music is essentially rooted in Rock and Roll. I really don’t want to be didactic and don’t have the energy for a history lesson, but, yeah. Everything from the last 60+ years of popular music essentially flows from the Rock and Roll Big Bang of the mid-‘50s.

Metallica has sold 125 million albums.  
Nothing is “popular with all listeners.” 
You’ll actually find people that don’t like…Michael Jackson…Beatles…Adele…Mariah Carey.  
But Metallica has sold 125 million albums.  
Pretty popular. Intro, verse, chorus, repeat, bridge/interlude/solo, repeat.  
Pop. 
I already said Jazz and Classical wasn’t pop.  
I don’t know how I’d describe One Direction, Take That and Coldplay other than, “crap.”

One is free to call this stuff whatever they want.  
I just prefer to describe the sounds of things than to just bluntly, hamfistedly apply made-up marketing labels to music.  

People either are brainwashed by all the marketing labels and accept them as “fact” or “truth,” just really enjoy segregating and labeling things, reflexively equate “pop” with “bad,” or some combination of all the above.

@kb673 I beg to differ.  
As I said, it’s all pop. It’s all rooted in “Rock N’ Roll,” which is popular music. Pop.  
Blues is absolutely pop. So is country.  
That’s “Rock N’ Roll.” (with a bit of gospel thrown in there)
Songs with a verse, a chorus. Repeat. Some sort of middle section. Repeat.  
Pop. All the same s**t, just different flavors.

You’re just thinking of “pop” in the terms that record companies, radio stations and media marketing schemes have sold you as “different genres.”  
The better to take your money with.  

If you want to accept a marketing scheme as objective reality as far as delineating, segregating and categorizing music goes, that’s your prerogative.  
If you want to just swallow these marketing labels that were made up to give certain businesses more money, go nuts, friend.

I prefer to just listen to music and decide for myself if I like it. You know…with my own ears. 

You’re also free to define what “pop” is, and how it is in any way useful to sit around and say:  
“no, no, that’s not rock and roll, that’s pop…no, no, that’s not metal, that’s stoner rock…no, no, that’s not reggae l, that’s ska…no, no, that’s not punk, that’s hardcore…”

@kb673 Yeah, you really don’t want to play this game.
The facts are all there for you. Some of us already have them. Some don’t.
Here are some Cliff Notes, a “Fake Book,” if you will: just Google “Tin Pan Alley.”
Then come and talk to me about “mountain music/bluegrass and blues.”
There you go again with “genre.”
If “pop” is a “genre,” please define it.

@kb673 You said, “You’re entitled to your own opinion, but not your own facts.”
A clear insinuation I don’t have my facts straight, or am willfully denying “the facts.” That’s where my use of the words, “you don’t want to play this game” came in.
I’ll just cliff note it here for you:
(from Encyclopedia Britannica)
“Tin Pan Alley, genre of American popular music that arose in the late 19th century.”

Just because “(How Much Is) That Doggie in the Window?” is a bit less fancy (although the two top singles of 1911, Irving Berlin’s ‘Alexander’s Ragtime Band’ and Harry Von Tilzer’s ‘I Want a Girl’ are pretty darn simple songs) than the typical pop songs of the ‘00-‘40s doesn’t make those early-20th century songs “not pop.”

If pop is, as you say, a “genre,” then how does describe and define this, “genre”?  
I’ll happily receive, with open arms, these “facts” I am ignorant of.

@tonyzvault51 
That CD I mentioned will not knock anyone’s socks off, sound quality-wise.  
I mentioned it as a CD of importance because it seems to be so rare and because it contains particular performances (of transcendent beauty) exclusive to it. 
There are plenty of far more sonically excellent recordings of Gould out there if Gould is something you like.  
The CBC Glenn Gould television show “Glenn Gould on Bach,” if I’m not mistaken, is the performance of Cantata No. 54 from which the CD’s recording (sonically limited but musically incredible) is sourced.  
I would personally recommend watching this on YouTube. Gould’s oratorical acumen and intellectual profundity is highly rewarding to listen to in between the musical performances.