TV Mounted above fireplace mantel - neck strain?

I dislike too high.

also consider proximity to speakers, l/r imaging height, and, where center speaker is to anchor the dialog to the screen.

I have found, directly below the monitor works best for center.

I have been able to blend this into several situations

https://www.ebay.com/i/233696110070?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&am...

never considered getting anything different.

center is a phantom created by l/r in 2 channel system, and when using home theater in 2 channel stereo mode.

however, using dolby 5.1, other surround ...., the center channel is given to the center channel, it is not the same, you want a properly located/blended center speaker, and it must be close enough to anchor it's output to the screen.

if using a sub in a home theater, when using only 2 channel mode, you want all the bass to go to the front, that is why it is important to get good, 'fuller' range mains, and understand your av receiver/sub/spkr hookup yourself, or have a friend nearby.