Here is the $100ea Polk LS250 satellite speakers:
The Polk TL2’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +0.93/–2.80 decibels from 200 hertz to 10 kilohertz.
http://www.hometheater.com/content/polk-blackstone-tl250-speaker-system-ht-labs-measures
NHT $100ea SuperZero:
The SuperZero 2.0’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +3.01/–3.03 decibels from 200 hertz to 10 kilohertz.
Pioneer $75ea SP-BS41-LR:
The SP-BS41-LR’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.62/–4.50 decibels from 200 hertz to 10 kilohertz.
Cambridge Audio $80ea Min10:
The Min10’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +4.82/–3.37 decibels from 200 hertz to 10 kilohertz.
Boston Acoustics $150ea A25:
The A 25’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +3.20/–2.55 decibels from 200 hertz to 10 kilohertz.
Sinclair Audio Brighton $150ea 50B:
The 50B’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +2.12/–2.88 decibels from 200 hertz to 10 kilohertz.
Klipsch Synergy $140 B-20:
The B-20’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +0.64/–2.39 decibels from 200 hertz to 10 kilohertz.
$200ea NHT Absolute Zero:
The Absolute Zero’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +0.94/–0.82 decibels from 200 hertz to 10 kilohertz.
Polk RTi A9:
The RTi A9’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +0.61/–2.91 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 49 Hz, and the –6-dB point is at 40 Hz. Impedance reaches a minimum of 4.49 ohms at 67 Hz and a phase angle of –49.39 degrees at 22 Hz.
So I take back what I said about Polk. They do have some very well-measured speakers.