Have a question about the Danley Wards. The way you describe it having a nice open airy quality. So do you get the real fullness that SVS subs seem to have? I have heard some of the entry/mid level subs and there is a fullness to their sound that I really love.
I need to spend another day at my friends house giving them a more critical listening session.
I would say first we need to get on the same page as to what the terms "airy" and "fullness" mean to us. For me airy and open is a way to describe non directional notes that fill a room. It has a presence you hear and fell, call it depth you can walk into, that surrounds you. Think of how music sounds in the next room heard through an open door, like listening through a veil. Now how the sound changes as you walk through that door; it opens up.
The bass honr is fast enough for music that denotes it is not a one note wonder or room thumper. It adds dynamics, depth and richness to music and sound tracks. Jet engines that rumble the furniture, explosions that shake the walls and still have the ability to articulate an upright bass in a natural "real" sound.
For me a bass horn and a box horn: be it sealed, ported, Nth order, etc... They are different animals. Like most things with sound, people have a preference for how they like to hear it.
So is fullness a range of frequency, the ability to go very low, or simple dynamics? Maybe your fullness = my richness. A tonal quality with extended range.