Chaplin
Better off silent
Thanks for this. Very helpful.The PX3-pro has better black levels. The big thing for the L9Q is the brightness if there's going to be daylight but it sounds like you're room is mostly dark with not much light. So I'd take better black levels and $2500 still in my pocket.
As for the sound system…it's not the route I'd go. I'm a bit of a snob though. Generally I'm not a fan of systems like that. It's the same level as a sound bar to me. 6.5" sub is going to be very little bass. It's upfiring atmos which is less than idea and no center channel. I'm also really not a fan for wireless for speakers.
Personally, if the L9Q package was within my budget, I'd get the PX3-pro and take that $2500 plus how ever much the sound system is and put it towards a receiver and good speakers. You don't have to go full 7.1.6 from the get go. You can always start with a decent 5 speaker base layer and build it up over time.