It is so difficult to give opinions to somebody, whose listening preferences and the soundprint of his/her system in an unkonwn room is likely different than mine. I have tried recently to complement with a sub my Wilson Benesch Act One speaker, which is rolling off at 35hz. I am listening mostly classical music at moderate level. As for classical music concerned, I felt that practically there is no need to complement my speakers with a sub. Most of the music is such that it does not trigger the sub, and once the sub is triggered, it was difficult to decide whether it was helpful or it was too much oomph. None the less, when I played electronic music (Suzanne Vega-Led Zeppelin-etc), the sub was continouosly working giving a floor shattering bass. So, If I would play mostly electronic music and I would go for floorshattering bass (and I would live not in an block of apartments but in a house) I likely go for a sub. But given my listening preferences, and my conditions as far as living concerned, I personally felt, that there is no need for sub in my system.
