I got my D4 mounted above the fireplace (50 inches (127cm) from the ground).
I did think it was too high first, but I have got used to it now, and we don't get neck strain because you sit back into the settee with your head just touching the top of the head rest.
My Old Sony 25" TV was about 3 Feet off the ground before so the D4 did look odd at first.
I have spend the whole weekend, fixing the D4 onto the wall mount above the fireplace and running all the cables in the wall.
My main problem was that the gas pipe runs down the length of the whole wall on the right hand side of the D4, so I have to reroute all the cables from the other side of the room to the Left side,
and moved my Hi-fi setup to the left.
My friends and family thought I was barking mad going to all the trouble, but everyone says it does look great,
I will post pictures when I have finished it all.
The main reason for my troubles is to ensure that the screen is front of you and all the speakers (5.1) are in the correct places, and I have my fireplace.
(I have mounted the Centre speaker above the D4, about 6 inches from the ceiling and it sounds very good)
Just waiting for the plaster to dry so I can re-paint the wall, but it looks awesome !!!!!
I view it from about 10 feet, and its looks bl**dy fantastic now.
I do agree with people who say they prefer it at eye level,
I wanted to free up the floor space and I always wanted one of these old Victoria fire places.
See attached Picture:
Bluebear.