MCACC does not need to do anything in the 20-30 Hz region. The only thing that may need to be done under 63 Hz is a bass boost for sealed subs and maybe to cut a peak in the 30-50 Hz region which MCACC will address it 2nd or 3rd harmonic in the standing wave setting. Not using MCACC is not advised since it is doing so many other things.
Before getting room TX, read the SC 09 or 07 MCACC manual and figure out the reverb characteristic of your room. MCACC can also help in that respect and save you some dough.
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