KEF recommend about 12" ish above head height. This I found was way to high and lost all but the extreme sounds from the rears. Blade showed this up, when Wesley Snipes throws his Glaive to decapitate the Vampire, the sound should travel from left front in an anti clockwise direction with some real jaw dropping effects behind you. With a KEF config you almost don't notice this effect, with them set at about 5' of the deck it really works well. Try racking"Hope I spelt that right" the fronts in a bit as well, helps the front sound stage. With the rears also keep an eye out on the low level boundary setting. If you are mounting the back or side rears against the wall leave this alone but if your using stands for the sides or rears, as I am, then flip the low level caps in the speaker posts. Not 100% sure why but you will notice the differance. Hope that helped, thanks for the warm welcome to this group. If you need any more help shout.