What do you think is the best sounding recording of all time?

[TheSneetch]

But definitely check out Imogen Heap. Song Hide & Seek on Album Speak for Yourself. Crazy vocal effects, but beautifully produced.

[Big Bottom Willie]

I am not a gear-geek nor an audiophile, but FWIW I have two albums that sprang to mind instantly when I read the question:

Sade - Promise (I have this on vinyl - simply amazing)

A Perferct Circle - Mer de Noms (the louder the better)

Of course, in a completely different interpretation of the question, I might also pick The Trinity Session by Cowboy Junkies... total goosebumps.

Rest assured I will be making an effort to listen to some of the previous suggestions!

[Big Bottom Willie]

"Nickel Creek. The vocal blend is foremost, but also the clarity and depth of the each instrument is among the best I'm aware of."

+1