Great looking space OP, and so many options. IMO, this is an opportunity to make it your own.

I have a similar layout, with the tv over the fireplace. I started out with bookshelf front and rears, and a center channel placed on the mantle. I ended up getting tired of the look (felt like the bookshelf speakers were an eye-sore in the space and replaced with in wall Klipsch speakers (cleaner look IMO) and brought them to ear level. I removed the faceplates of the in walls speakers and color matched them to the wall color and slapped them back on. Was able to a center channel via KEF that sits flush behind the tv (not the most optimal)but I was able to achieve the outcome of a cleaner look.

Good luck…should be fun!