$8K is more than ample, if you shop wisely and avoid the usual scams and snake oil products like exotic cables and power conditioners with boutique shops and BB Magnolia salesmen love to pitch.I am doing 7.2.4 with a projector. Room is 26L x 22W. Seats will be about 10ft from the screen I think, whatever the optimal is for 100+ inch screen.
Budget: 15k including projector, accessories, seating, etc
Fronts: Klipsch 8000F. I demoed the B&W 702 S2 (obviously 3x the price) but they seemed like they would be fatiguing
Center: Klipsch RC-64 III
Surrounds: Klipsch Reference Premiere RP-250S for Side and rear surrounds
Heights: ceiling already has 4 speakers positioned "atmos style" and its good enough for now
Sub: No idea yet. Please recommend me something that won't break the budget
Receiver: Marantz sr7015 9.2.4 most likely. It has all the features I need (wifi, airplay, hdmi 2.1) at a good price. Open to recommendations
What do you think? I am hoping to keep the audio budget 8k or under.
If your usage is mainly HT/TV not 2 channel music, you do NOT need big hulking towers with 8" woofers. The center does 60-80% of the HT output and 99% of the dialogue, but no speaker salesman will ever tell you that since they make a lot more commission selling you big hulking towers than modest sized bookshelf speakers. So, if you get towers because you simply have a strong VISUAL preference for them, I'd just get something with 5.25" or 6.5" woofers ... in the case of Klipsch that would be the RP-5000F or RP-6000F.
If you are worried about speakers being fatiguing because you are sensitive to strong treble and/or have a highly reflective room with hard floors and lots of windows, both Klipsch and B&W would be poor choices. I'd look at brands you probably haven't heard of but which would be more likely to be a safer acoustical match: Wharfedale, Emotiva, Chane, etc.
Subs: buy from an internet direct subwoofer specialist company like Hsu, Rythmik, SVS, or PSA. If the 26 x 22" room is fully enclosed not part of an open plan layout then a pair of $600 subs like SVS PB1000 Pro should be fine. Do NOT pick a sub only because it's small and pretty with a bloated pricetag, you will regret it.
Since you are doing a PJ, I would suggest doing an AT (acoustically transparent) screen so that you can put 3 identical speakers behind it in vertical alignment...ideally with a false wall, or simply hanging in front of the speakers.