Hi everybody. Well, this question appeared after giving a listening to Pink Floyd's "The Dark Side Of The Moon", something I didn't do for a long time. My feelings were (and still are) that the intro section of "Time" was so sonically beautiful and perfectly done that not even them would never ever make it sound like that again if they tried. Of course, it's not difficult to get "perfect sounding" recordings with all the technology available nowadays, but my point is: Think of a band that enter a recording studio trying to re-record one of their works and they won't get it to sound like the original even with the same musicians, gear and studio tricks. Aside from the intro section of "Time", I'd also add the original versions of Rush's "Tom Sawyer" and "Limelight". In my opinion, no matter how hard they try, they won't make that combination of guitars, bass, drums, synths and vocals to sound like that again. Someone may say something like "well, this band can make it sound even better if they want". Very subjective stuff, I know, since there are lots of aesthetic criteria involved, and that's why I'd like to hear which recordings fall into that category of "unreplicably perfect" for you. Thanks for your input! P.S.: Not talking about solos. There are many examples of "perfect takes" on improvisations, but my point is about the sound that a whole band achieved into the studio with previously planned and structured material.