Best 10 minute + Pink Floyd song

What is the best 10 minute and up Pink Floyd song?

Sorry fans of Ummagumma i'm excluding that album (1/2 of it is live and i'm sure you can find a better song from these choices than anything on the other half)

 

I dig APB a lot, but all the rest are tops 2

 

I voted for Echoes. That song always does it for me.

 

what do you hope to find---down in the pig mine

 

Echoes!

 

This was a tie for me between Atom Heart Mother and Pigs(Three Different Ones)

 

Atom Heart Mother reminds me of Star Wars for some reason. I'm not applying that with any positive or negative connotations, it's just strange. Usually if I associate a song with a movie or video game or something I was watching or playing the game at the time. I don't remember watching Star Wars around then, i think it's something about the brass instruments.