Last post with three songs, I'll only post them one at a time in the Top 5.
08. Welcome to the Machine - Wish You Were Here
This song is one that always seems to get lost between the more popular songs on Wish You Were Here, namely Shine On and the title track, and that's a damn shame. This features some great lyrics about the music business and the music fits the subject matter perfectly, with the whole track feeling very mechanical, both because of the constant rhythm and Wright's keyboard patches. The vocals drown a bit in the song, but that was probably intentional as well - it gives the feeling that the content of the music is actually secondary to the music itself, when talking about the music business, at least that's how I've always felt. Truly a great track and it's a shame that so many people overlook it.
07. Brain Damage - The Dark Side of the Moon
This is what I consider to be the climax of Pink Floyd's highly acclaimed The Dark Side of the Moon, with the very mellow and soothing, yet still somehow eerie lyrics of the verses contrasting with the grandness of the chorus. The main guitar motif is very hypnotic and draws you in, just as the vocal delivery does, before the chorus breaks loose. Yes, it's only a good three minutes, but they are used damn effectively, in ways that few other bands could ever achieve.
06. Money - The Dark Side of the Moon
While Brain Damage is the climax of The Dark Side of the Moon, this song is my favourite by a hair. The 7/4-intro has an awesome groove and the lyrics are, as usual, awesome throughout. The guitar solo, where the song switches into 4/4 is also great, though I actually prefer the guitar-sax interplay on Pulse over the studio version. I was quite shocked with how many people voted against this song, in the survivor, to be honest, because for me it is definitely one of Pink Floyd's most enjoyable and well-written tunes.