"you don't have to worry about it falling down."
I think it's a great idea. You will never have to worry about the HDMI cable run - it will be short. And shelf mounting is easy and convenient.
Crimson makes a nice rack too - RC42U (crimsonav.com)
Or getting the power to the ceiling. Fishing in a basement where the ceiling is not full of insulation is not bad. This will be upstairs with the attic above. In the old house, 70s build, it was easy to getting around in the attic as insulation was microscopic. This newer-build house is different. The air handling is in the attic too so I am going up there once we close but I anticipate that it will be much easier to just put up a rack. This is not our forever house either so, I do need to worry a bit about modification that would hurt resale.I was impressed on how sturdy the Slim 5 series is. I would not have thought so but those Middle Atlantic engineers seem to be on top of things.K
I don't consider mine super sturdy. Mine is on wheels and is the largest size they make. I also have 42 of the 43 rack spaces filled. So a lot of weight in my rack.