comfortably numb solo > stairway, or anything else zepplin has to offer. don't get me wrong, i love zepplin, but gilmour fucking rips it up. oh, and the solo is played by gilmour. he and waters collaberated to write the song, with gilmour doing most of the work as it was originally written for his solo project.
also, listen to money by pink floyd. that song is fucking awesome (that goes for everyone).