Thanks guys for the complements!
I did leave the cover off from in behind the fireplace which will pull from in behind all of the cabinets but I don’t trust that it will get enough ventilation so I’m going to drill some ventilation holes behind the TV.
On another note, the mantle looks like it’s a little lighter in the photograph but it isn’t a noticeable difference when just looking at it. Also, the two places that show a nail on each side near the bottom has been touched up and stained since the photograph.