I had mentioned I used Canton speakers with my 590/530 setup and it’s going well.
would have liked to try those jbl pro series but I think they were a little more than I cared to spend
Anyways, I talked to the folks at accessories4less, they talked me out of getting 8 inch and said I’d see zero difference with 6’s. With Atmos and unmixed Dolby surround I can’t say they were wrong. But it might depend on how big your room is and how you plan to use them. My room is small. But it’s kind of a one time shot so I say go for it and do it right what ever that is for you.
I also looked at the RSL speakers and considered those. But they were out of stock and I was impatiant.