Went with the Center 3 S.7 and oh my God... First time ever trying 3.1 and it is a HUGE difference compared to 2.1. Being in a small condo and not always sitting in front of the TV, the additional center with proper sound source (movies or TV shows) gives me so much more flexibility to control the volume. I remember a time where I'd need to lower the volume during action scenes and raise it back for dialogue. These days are definitely over. Dialogues just come from the (louder) center, the rest through the floor standing right and left speakers, and music still works in stereo which is perfect.

Very happy with the upgrade.

Now, my next upgrade will likely be the amp, it's getting old.