I voted for Piper, because it has Syd as the predominating creative force, has more songs than Saucerful, and has Astronomy Domine and Matilda Mother on it. What more could you ask for on an album?

True; you could ask for a better mix. That is Piper's one shortcoming, I believe. I want that mono edition; if I got it, I could finally listen to Piper on headphones without being annoyed.