Best results for Avantgarde speakers?

I own a pair of Avantgarde Duo Grosso speakers. I'm looking for those with experience in Avantgarde speaker placement. How close or far from the wall should one locate the speakers? Setting crossover point and sub volume etc. I'd be interested in any off line discussion or advice on this subject.
I play with my Mezzo´s close to the wall,
the width (center to center) between my Mezzo´s are a bit wider than the distans to my ears and axis points to my ears. Since every room is different, you will probably end up with another placement. In the matter of crossover point and volume, that will depend on your room and the other equipment you are using.