Mounting display and computer on the wall

I own a MacMini and a 27" thunderbolt display. I am about to mount everything on the wall. I purchased all the VESA stuff for the display and a support for the MacMini with a locker. Anybody has done that already? It just to check what is the best height for the display and the best position for the Mac Mini. I found out that if I want to allow the display to rotate I need a clearance of 7" but then I find the display a bit hight :-/