I would like to experiment with a true Atmos setup. However I have a drop ceiling
There are advantages to using front and rear height channels, mounted high on the wall, see the pic of my system or the pic above of abbey road studios. They are easy to wall mount but I chose tall stands because active speakers are heavy. See:
https://www.svsound.com/products/prime-elevation
And I might sell the house in a couple of years as we downsize
Those prime elevation speakers are wall mounted, no drilling holes in the ceiling. I recommend you look at the Onkyo RZ50 receiver, I use Onkyo in the mancave (which also has a drop ceiling, I wall mounted the height channels)