If you really like your speakers, but aren’t liking the bass, then small ported subs would likely give you the type of bass that you are looking for.
My speakers pretty much mimic your speakers 3dB down point for bass. I really like the high level input. People argue against omitting the upper limiting crossover, but for our speakers this isn’t an issue. My RELs are fast and provide a tight low end. I’ve got the crossover set very low, so the main speakers supply most of the bass. Wilson designed my speaker’s crossover, and I didn’t want to interfere with their design by adding a high level crossover on the subs.
That said, my listing room is over a two car garage, and the bass was crazy to subdue, so I had to work at placing a number of bass traps, heavy carpet with heavy pad and a large couch. I’m listening to vinyl so I also needed to add a super heavy equipment stand, and all this combine to subdue the room interaction caused by these additional subwoofers.