Would like to set up theater in attic remodel. Have 10k to spend on speakers/AVR. Already have AT screen, proj, 4k UHD player and subs. In-walls preferred. Paradigm, Revel or Triad my top three but other suggestions welcome. AVR b/w Anthem or Yamaha. Best bang for the buck (5.2.2 vs 5.2.4 vs 7.2.2 or 7.2.4) to stay on budget. All suggestions appreciated. BTW, attic is 16x26, sloping ceilings to knee walls, seating 15-16' from scope screen.