Those would be a good option if I could mount them on the TV wall, but I don't see how I could. The TV will be mounted on the wall bumpout shown in the drawing. The bumpout only extends 8" on each side of the TV, so there won't be enough space for these.
Regarding Front Heights... being new to this, I had already purchased 4 Klipsch KHC-6 in-ceiling speakers for Front and Rear Heights, but have since been told they're probably not a good choice, given the extreme height of the room at 14 '. So, yes, it looks like I'll also be looking for Front and Rear Heights that can be mounted on the left and right walls, perpendicular to the TV. (There are windows directly above the french doors, extending all the way up to the ceiling).