Maybe I missed, but didn't see the size of your audio room. With base, the size and shape of room, along with budget, will determine what to do - one good sub or a swarm of subs.
I have a medium/large room (14' x 27'' open to an additional 11'x13' adjoining room) and a single ADS Sub loads the room from 60Hz down to 20Hz incredibly well. In general, the smaller the room the more need of multiple subs to load the room with convincingly deep base.
If your room is a bit smaller - say 12'x20' (3.5m x 6.5m) for deep full base I would think you could do very well with a pair of good subs that will go down to 20 or 23 Hz (you might check the used market) and set them to operate below 60Hz.
Keep in mind, quick and punchy base is not deep base. Quick and punchy base (at and above 60Hz) and deep base, getting down near 20Hz, should integrate and augment each other and even after getting the right subs - that will take some time, work and patience.
Best of luck......Jim