The Pioneer is an excellent choice and it has preouts if you ever feel the need for more power. Multiple subs(large) will be needed for that much space. The subs will make or break the HT.
Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus Five 200 amp, Chase SS 18.2(2), VS 18.1(2), Samsung BDP F 7500, Asus/My Book Live HPC 4 TB
Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500