I assume these DVD's will be Duel Layered? It is impossible to keep the quality high enough if you go single layer as too much compression and filtering would be applied. This is not even debateable.
My SUSPIRIA "Fixed Audio Edition" is Duel Layer with PCM and the 5.1 "remix" is included so you can switch back and forth and be astonished at how pathetic some DD5.1 remixes are compared to what was on the laserdiscs of the 80's and early 90's.