Dr. Sapirstein's post about Suspiria:
Out of the many different editions of Suspiria released on video since 1978, none was ever true to the film's visuals and sounds. The best looking and most faithful print was the one used for the 2001 anchor bay 3-dvd set, yet it suffered from its very poor encoding, and had a truncated soundtrack (with missing sound effects, music, and sometimes inaudible dialogues). All the recently released Blu Ray versions were created using a horribly recolored print (approved by the talented yet either senile or money hungry director of photography, Luciano Tovoli), and used terrible noise reduction. The result looked more like an amateur HD upscale than a proper blu ray, and was highly criticized and loathed by purists and fans of the film. So was the infamous red dog... This new preservation edition intents to present argento's masterpiece the way it was seen back in 1977 for its original release: the film was restored shot by shot to its original colors, tints and contrasts. The sound mix has been carefully recreated and restored, using the best elements from various sources, and is now presented in its original 4 tracks stereo audio mix. As a respectful fan of the film and its masterful and innovative photography, I consider this preservation to be the best, most authentic version available so far.
once I exchanged a couple of emails with him, and seemed to me a person who knows his job; it will be a good thing if he can answer some questions about this movie in this very forum, because "everyone is innocent until proven guilty"... so I will leave him the benefit of doubts, and restore Suspiria as possible future project.