I was just listening to some Joe Satriani and I heard his "=D19C4F4D7743E5A9&index=0">Summer Song". In my Opinion, Joe Satriani is the best guitarist of all time, and I think this may be his best instrumental song. Some of my other favorite Instrumentals are:
Satch Boogie-Joe Satriani
Dialectic Chaos-Megadeth
Echo-Joe Satriani
Canto 34-Five Finger Death Punch
I have a playlist on youtube with all of these songs. Click here to view it. Anyway, I am trying to create a list of the best rock/metal instrumental songs of all time. If you have one, please add it to the list I have started here.
Its hard to know what instrumental song is the best "ever" whatever answer gonna be influenced for a personal perspective or some mass-media trend. After all is a matter of tastes, just enjoy the music.
I like Three Flights Up by Yellowcard. And even though they can't really be compared (other than the fact they're both instrumental), I also like Always With Me, Always With You by Joe Satriani. Those are my favorite instrumentals.
I'd cast my vote for Yes. Any Yes song will have intricate and varied rythmical structure and a pretty unsettling instrumentation; they're one of the best bands in the history of music, if not the best in term of progressive rock.