@mcashiola, I got new SP 888s just over a year ago. My quick answer is yes, they do produce impressive (musical and natural, not necessarily dominant) bass.
My experience:
From the start they were better than my Janszens which are great speakers but worked much better in my previous house. There is a lesson in room matching.
My open floor plan is 28x23x11 so no comparison with your situation there.
When I got the 888s it was part of a plan to simplify my system. So that included going from mono blocs and a line stage to an Accuphase E-280 integrated. Quality not quantity electronics.
Recently I made two upgrades. I replaced the metal strap between the T/M and W with the same 12 g wire as connecting the speakers. And I replaced original footers with IsoAcoustic Gaia II Neo footers. That resulted in better defined bass, increased placement within the soundstage, and overall better clarity and instrumental definition.
I'm not against subwoofers but have no sense of need for them. My bass extension is within the 30 Hz range.

