So. You asked about the 9060’s. I can only offer my opinion based on what I know of their design as I’ve not heard them. They’re kind of an odd duck in that they’re bipolar and have built in subs. For the latter, I find the claim dubious, as in compared to a real subwoofer they can’t offer the same level of performance.(do not believe the published specs. Find some reviews with measurements). Especially in a big room such as yours. Secondly, bipoles as mains usually take great care in placement for them to perform well. Since your going behind a screen, or right up next to the built in entertainment center, I don’t think you have many placement options to accommodate them. At roughly 2k for the pair, there are a lot of options out there. Jbl, klipsch, kef, SVS, Golden ear, elac, psb, and RBH are a few(and others I can’t think of off hand) that I would buy before def techs personally.