Floyd all the way. In fact I even got some tickets to "The Australian Pink Floyd Show".
Led Zeppelin has some good stuff, but most of it just hasn't aged well. Pick an album and you can find a Floyd song that is worth listening to no matter how you're feeling
Zeppelin is a great band, but Floyd has always captured my interest and imagination far more than Zep ever did. Every album and song holds the same mystery and message for me that they did when I first started really listening to them over 20 years ago.
Hmmm...very though one indeed!
But, i'll be the one going against the majority and say Led Zeppelin because argueably along with Sabbath and Priest they brought us metal!
That and stairway to heaven is an amazing piece of music.