For once and I sincerely hope not the last time, I totally agree with you. M Subs in a full DSP system are very effective, especially SW1600s down to 20 Hz easy to control and very flexible in my set up. My D2500 only goes down to 30Hz as a bumper up at the rear for films
Glad you are enjoying the experience.
Hector

AV: Thorens TD160B, SME, ShureV15MK2, 500, 598, 861v4, DSP7200.1, DSP3300HC Samsung UE55, SkyHD.
DINING: MS600, AC200, DSP5200SEUG.
STUDY 504, Roon Nucleus + RevB, 808v6, 5200SE, Mac & PC (Touch Screen), Prime+PS Grado GS1000i
HORIZONTAL: M80, MS200, Red Rose Spirit + Sonus Faber Toys, iPad Mini
A capella to Zydeco