For one, never put a rack in direct view of the monitor. The lights of the rack no matter how masked (I see you have a mesh door on the rack) will still be apparent and distract the eye. Two, did you centerline the room? It doesnt look like the tv is center with that wall vent. Maybe its just me being picky, but whenever I lined a room, I would either a) move that vent over center to the tv if it were off center, b) center the tv on the vent.
Also, is that left channel speaker straight? Looks crooked in the picture.
Three, do not place speakers on the bottom edge of the display, always center to the vertical axis of the tv.