Nanner Split said:
Did anybody check out the mono edition of Pink Floyd's "Piper at the Gates of Dawn" that came out for its 30th anniversary a while back? That one was strikingly different from the stereo as well (Interstellar Overdrive in particular. There was a lot missing from the stereo version!)

YES! I have that mono boxed edition of "Piper at the Gates of Dawn", and it's been the only version I have listened to for years now. Somehow I lost my CD stereo edition in one of my many moves, or it was most likely nicked by a friend. I was truly hoping that EMI would have released the mono "A Saucerful of Secrets" on CD soon after, but no... I'm also a big fan of the Monkees and Jefferson Airplane, and realy appreciate the stereo and mono editions of their early albums in a single package. The Jefferson Airplane only did the stereo/mono Cds for their first two albums, and the Monkees' first four. As for Frank Zappa, it gets very confusing. Not only are there stereo and mono mixing variations, but also difrent mixes exclusive to both vinyl and CD releases. The new Zappa "Project/Object" series releases for the albums ("Freak Out" and, "Lumpy Gravy / We're Only In It For The Money") is trying to sort this out, and has entire original album mono mixes included. Another mono / stereo mix CD release I am very fond of is "The Velvet Underground with Nico" Deluxe edition. I tend to reach for the mono disk more then the stereo.