So you are consolidating space by replacing the SVS & HSU with the Emotiva Sub + Room Correction.
So, come on. You didn't just walk up to your wife out of the blues and said, "Honey can I buy a new subwoofer?" You buttered her up first, right? Come on, let's be honest here! That's cool, though.
Lots of factors come into play here. The big boxes have to go into the front corners (no choice) and I think that excites the room modes. The small size of the Emotivas should allow for placement other than in the corners.
Considering the cost of the SMS-1, it's not a lot more money to get this system that includes the amp, dual subs and room correction.
I'd like the get the Hsu back into the bedroom system, it's intended purpose. This will also allow me to re-purpose the SVS towards a separate 2 channel system.
It sounds like you're questioning whether I need more subwoofers. Honestly, I don't, but I want to try this one.
I didn't have to try too hard to convince my wife to try this system. She sat through all the demos with me. She saw and heard the system and was perfectly willing to see how it would work in our situation. Ya gotta love a wife who's willing to experiment with subwoofers.