It’s a shame to spend all that money on all that nice gear when you don’t have a room suitable to enjoy it.
I don’t see how those big 280Fs are going to fit where you want to put them. And if you do shoehorn them in, they’re going to be so close together that you’ll get no separation at the seating position.
And IMO nothing sounds worse or is more distracting than surround speakers on stands right at ear level, right next to the couch, firing directly into your ears. If that’s not bad enough, you’re only going to hear the one closest to you, not the other one. On top of that, the 250S is designed to go on the side walls of a traditional shoe-box shaped room. Note that Klipsch’s web site clearly notes that they are for the “largest” rooms. That doesn’t fit your application at all.
And that awesome sub absolutely will not deliver its full potential located below the TV. Subs do best when placed near a corner with continuous, uninterrupted walls in both directions, not on a wall with a big hole the middle of it. It will never get its rated 20 Hz extension at that location.
Seriously, I’d re-think this whole endeavor before spending all this money. I’d recommend a nice soundbar instead until you can get yourself set up in a suitable room.
Regards,
Wayne A. Pflughaupt