I had some .7's and had the same issue you are talking about. I had one 10" Klipsch sub from the early 2000's and bought a matching sub for it on ebay for $140. I put them in opposite corners of the room and they filled in perfectly. They wanted a really low crossover too, I had them at a little under 80 Hz. I also had an Outlaw Bass Controller (ICBM) to pull some of the low bass of the .7's. I think that helps too.
FWIW, still ended up getting rid of the Maggies, they just couldn't hit hard for the music I liked (Rock and Roll).
FWIW, still ended up getting rid of the Maggies, they just couldn't hit hard for the music I liked (Rock and Roll).