Ok,
You have $12,000 to spend on speakers any brand
the needs are Front R/L, Centre, 4 Surrounds and Dual Subs
also, but not mandatory front heights

Future would be for or a 7.2.4 Atmos setup. but the In Ceiling speakers or are not currently needed. Not sure how Atmos is going to go or if Dolby PIIz or DTS:X is all I will do.

Wondering if 4 QS4's would work

Anthem MRX520
M5HPv4
VP160HPv4
QS10v4