About NS-1000M bass response. Have never owned (but have listened to) JBL L100. OK, have been wanting to write this numerous times, flame me for it- the amateurish comment deserves it, but I will refund the airfare home from Japan of anyone who can honest claim that these NS-1000M do not shake the room at loud volume. Perhaps 'loud' is the key word here. Maybe it's an abnormal combination of ancillaries, room, speaker stands and room treatments (I suspect the bass traps' configuration make a significant contribution).
Almost everyone can relate to the DSTOM heartbeat at the beginning of side 1: the floor is vibrating, windows are rattling... can feel the heartbeat from the recording pounding in the chest.
I don't disagree with the general consensus that the bass response can be anaemic in many settings. But give them a chance and they'll give great bass performance.