Hi there,
thanks for the advice. I can't change the room, in fact it's a dedicated home theatre room! The room is symmetrical and thus the responce from the left and right speaker is more or less identical. I'll try moving the dipoles around a bit. I'm a bit reluctant to move them a whole lot, they give me a very good depth at their present location.
Some pictures (not 100% up-to-date) of the room can be found
here.
regards
Leif