I've found the best (specifically: clearer dialogues in movies) sound is with the axis about 15 degrees offset (so neither zero nor perfect toe-in).After trying both dbr62 and ub52, I have to say maybe all Elacs sound flatter and better with no toe in. Just point them straight down the sides and they sound much more normal and better. Same even with audyssey room correction.
I don't know if I am interpreting the diagrams correctly but maybe it's because there is a slight rise then, in the 16KHz region? I think is shows up on Amir's diagram too, as a small darker red spot?