I think the approach i'm going to take in ceiling is safe n sound against the subfloor, then normal insulation (since we already have it we may as well use it), sound isolation clips with furring channel, osb, then 5/8" drywall with green goo. I'm still doing some research but the biggest obstacle is trying to prevent the lower frequencies from making it upstairs.
LFR1100 VP180HP EP600 M3 In Ceiling x 4 M5OW M2 - Atmos rears ADA1500.5 M3 Outdoor Speakers ADA 1000.8