100 watts enough?

From John Atkinson/Stereophile,

"The EgglestonWorks Andra is moderately sensitive, my estimated 87dB/2.83V/m (B-weighted) reading agreeing with the specified figure. Its impedance plot (fig.1) suggests that the speaker appears to be an easy load for an amplifier to drive, the magnitude dropping below 10 ohms only in the high treble and below 130Hz, and the phase angle generally remaining low. However, it does reach 4 ohms in the low bass, around the tuning of the twin ports. There is a very slight wrinkle in the impedance traces between 300 and 400Hz, this generally indicative of a cabinet resonance of some kind. However, as might be expected from its massively constructed cabinet, the Andra is impressively inert. About the only resonant mode I could find was on the woofer enclosure wall (fig.2) at 350Hz. This is well down in level, however."

Given this assessment coupled with the OP's stated  "neighbors"  situation it seems that the CH Precision 100 watt amplifier is far more than adequate . I guess I'm missing the rationale of why a more powerful amplifier is advantageous.  It appears that this amplifier would coast driving the  "easy load"  (Atkinson's words) Andras to suit the OP's circumstances. 
Charles 

At the risk of appearing petty, perhaps it's because some might feel that the amps power output it merely adequate.

Hi @tomic601,
I bet Casa Pacifica sounds absolutely gorgeous!
Based on Atkinson’s description of the  Eggleston Andra speaker impedance characteristics I believe that your  Music Reference RM-9 would a good match.
Charles

@unsound,
Not petty. However given what we know,  kijankii’s calculations and Stereophile measurement/testing, why would one conclude "merely adequate "?
Charles

Kijankii's measurements: ...."...102 dB@100W" seems closer to adequate than far more than adequate, at least to me. And at the risk of redundancy; it is a rather large room. I'll hazard a guess that the neighbor leaves home on occasion.