These Polk Audio RC80i speakers are pretty popular and affordable:
https://www.crutchfield.com/p_107RC80I/Polk-Audio-RC80i.html?tp=193
NOTE: If you want to use the Sonos Architectural by Sonance in-ceiling speakers, your holes are cut too large. They use 8 1/4” diameter holes.
Also, in-ceiling speakers are usually not recommended for the front channels in a home theater setup. You should consider using only two of the in-ceiling speakers as rear surrounds for the TV zone and power them with a Sonos Amp. Then get a Sonos sound bar like a Sonos Arc or Beam for the front channels and add a Sonos Sub to complete the system.
Is there a room above the speakers? If so, do you need to limit sound feeding through the floor above? Enclosed speakers will reduce (note that I said “reduce”, not “eliminate”) transmission through the floor. Stuffing insulation around the speakers will help too.