Thinking of mounting a trio of horizontal on-wall speakers under my TV

[RocShemp]

I wasn't sure were exactly to post this. I hope I picked the right forum area.

I have a pair of Klipsch RF-63 towers flanking a 65" LG C2 OLED, and a Klipsch RC62 below said TV. Although I like the sound of my front speakers, my space is very small (7'11" H x 13'4" W x 10'6" D, with a viewing distance of 7') and I would like to mount a trio of on-wall speakers below my TV at it's exact width. I have cement walls so in-wall speakers are not an option. I was considering a horizontally mounted pair of HECO Ambient 11 F speakers flanking a horizontally mounted HECO Ambient 44 F. If the intended dimensions were right, I would be willing to opt for a pair of Ambient 22 F speakers flanking the Ambient 44 F. Are these good options or would you recommend something else within their price range?