I'm not a fan of the top mounted center channel stands, scared to death it would fall and damage the speaker or display. Doesn't look very sturdy and I'm assuming you have a large heavy center since it will not fit under the display?
I bought a 55 just before the holidays and didn't realize how dark it was until I exchanged it for a 60. I really didn't notice modern family being that dim except for the restaurant scene. I normally watch on THX cinema.