I would like to add PSB Synchronies to that list;

the towers...
The Synchrony One's listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.18/–2.24 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 56 Hz, and the –6-dB point is at 50 Hz. Impedance reaches a minimum of 3.32 ohms at 70 Hz and a phase angle of –37.55 degrees at 27 Hz.
It requires a stout amp to drive these however. They've garnered nothing but great reviews in the audio industry.