Tight, fast, articulate bass is clean bass (or is it the other way around) and that's what I get with four subs. I have a SWARM system and the bass helps mids and highs. No boominess, no sludge, no heaviness. The four sub recommendation is some of the best advice I ever received.
Did you ever buy too much bass?
I talk a lot about bass and integration of subwoofers in a system and I realized that I need to hear more about the experiences auidphiles have when they go buy speakers and put them in a room. Did you look at specs? Did you audition in the home? Did you end up with too little or too much bass compared to what you were expecting??