One drawback with wall mounting is that it’s hard to see/reach back there to plug in cords if you add a component or need to switch things around.
If you don’t use the fireplace anyway, you could set up the TV on a low cabinet in front of it. If you do use the fireplace it’s probably a bigger source of risk for your kid than the TV.
I noticed, even if others didn’t, that your walls are plaster. That means it’s very hard to install outlets behind the set on the wall without major work. If you aren’t using the fireplace for heating, why not get it covered up? That way you can arrange for cables and outlets to be placed where you need them and you will be able to get the height right for viewing and still have the cords and clutter out of reach of the infants.
That may not be practical for you though.
My preference is definitely against mounting the set too high. If you are using the TV as your main home entertainment, you really need to make sure it is comfortable to look at as the primary criterion for placing it, and I feel the same pain in the neck as others do when looking up at the screen for any amount of time.
I did it because it was a very small space, and the most logical location.
The height wasn’t a big deal; I’m 5’9", and the middle of the screen was about at 5 feet (I’m doing a SWAG mental measurement based on my height). I didn’t find it uncomfortable, nor did my mum or fiance’. All of us are tall, though.
For those complaining about height, how close were you to your TVs?
In my setup, I’ve never had any discomfort, but I’m also at least 12 feet away from the screen (my easy chair) or 18 feet at most (the love seat). For me, at least, never any kind of neck strain. In fact, I find it much more comfortable than the TV on a stand in the living room which is at eye level (when seated).
Since you don’t run your fireplace very often, it’ll be a non-issue. Just be sure to put something on the top of the mantle to deflect heat if you do happen to use it. It can be something temporary.
We mounted ours on top of the fireplace because our other options were to put it on the only full wall (where the full length couch currently sits) or above the fireplace. So we put it above the fireplace. It works great when you recline, not so much if you want to lie flat.
Placing your TV above the fireplace makes it a focal point. Adding the couches/chairs in a semi-circle for the proper viewing angle make it a pew for TV gods. Make the fireplace itself the focal point and put the TV somewhere else.
I don’t really see the need to wall mount the TV as a child-proofing measure. TVs have been at kid level since day 1. They don’t really mess with it. The remotes on the other hand…
Speaking for myself, we didn’t worry about the TV at all. Ours sat on a stand with shelves for components below. It wasn’t the TV but the VCR/DVD that I didn’t want the kid to get at. So I made a lockable door for the bottom half, and problem solved. I made the door out of white board so we could write and draw on it. Our child never fiddled with the TV at all. Frankly, I could not stand having a TV up high on a wall.
This is part of why I use a projector. The projection screen can be easily rolled up out of the way if I want a nice focal point. (Not that I have actually done that in three years, but I could.)