Thanks for your feedback guys...

I went ahead and ordered the Model 7100 amp about 2 weeks ago. Guys, it made a noticeable difference on the bass and midrange. Although, the Paradigm Monitor 9 v2 are very efficient (91Db sensitivity...), they can play very low bass in the 30Hz to 40 Hz region. The Yamaha receiver (on its own...) drove this speakers pretty well, but the Model 7100 has much better control and tonality when the bass goes low. The midrange has also improved noticeably. However, the smallest improvement was on the highs (as you guys told me...). Although not as "crisp" as with the Yamaha during two-channel Stereo playback, I still felt there was room for improvement. So, out of the blue, I decided to try switching the speaker cables which are UltraLink Excelsior 10ft biwire pair. So, I tried out the Analysis Plus Clear Oval biwire cables I have on my second system and "presto"... The cables (of all things...) made a noticeable difference on the highs (warmer...) while the bass and midrange remained as good...

So there you have it... I must say I am very, very pleased with the Model 7100. Is more efficient than the "onboard" discrete amps on the Yamaha receiver. Is well-built and runs "cool".

-Luis