On the basic stand, from the desk to the top of the monitor, is it still ~45cm for the Crossover?
The Crossover is adjustable....I believe the lowest setting for landscape from desk to bottom of monitor is around 2.5", the highest is somewhere around 6". I don't have the figures in front of me, but that is what I remember.
EDIT: I noticed you said the "Top" of the monitor. In that case IDK.