Unfortunately, a good portion of the above release is upconverted then heavily filtered from the old Anchor Bay DVD in order to have completely accurate colors. I commend the effort, but the end result is not alltogether enjoyable. Speaking of which, the original Anchor Bay DVD seems to be the best source to reference colors AFAIK.

The DVD with lossless PCM is I believe Matt Steven's version. He's recently been active around the forums, so, dark_jedi, you can ask him yourself whether his audio is BitPerfect or captured. Honestly, I'd be interested to know; never got a chance to ask myself.

The best BD sources for Suspiria, video-wise, are the French BD and the Japanesse BD. For the first two thirds, the French BD has the best video quality, color-wise, being the only transfer not to be overtly pink; unfortunately, the contrast seems slightly hotter than the Japaneese BD, whose main issue is being 29.97 (but it IVTCs easily). The Japaneese BD is the best for the final scenes: when (mild spoilers, I guess) witnessing the coven talking about Susy and meeting Helena Markos.

Anyway, hope this information helps. I love these movies. Would really want to see a project come to fruition.