I would first see if a 2.1 setup made me happy. If not, I would then try 3.1 and find out whether it was an improvement.
Finally, if I were willing to risk a mess from cutting into the ceiling, I would look into hiding 12-gauge CL2-rated speaker cables inside the wall and over the ceiling (in the attic), if possible, for ceiling-mounted surround speakers. But these ceiling speakers would be utilized as standard "side" surrounds, not for Atmos. You can add ceiling-mounted Atmos speakers simultaneously or later, if desired. (Consider running all the hidden cables for surround and Atmos at the same time for convenience if you choose to install Atmos speakers at a later date.)
Music room: Cary SLI-80 tube integrated amplifier, McIntosh MA6500 integrated amplifier, Quad 99 preamp, Quad 909 power amp, Acoustic Research AR9 loudspeakers, Yamaha CD-N500 CD player, Teac UD-503 DSD DAC, Phase Linear 8000 II linear-tracking turntable.
Theater room: Panasonic 65S60 plasma television; Yamaha RX-A2020 (preamp section); Adcom GFA-5503 and GFA-5400 amplifiers; Polk LSi25, LSiC, and LSiF/X loudspeaker system; Velodyne FSR-18 servo-subwoofer.
Last edited by Alex F.; 03-25-2020 at 06:15 PM.