Looking for speaker recommendations that I can purchase on Amazon.com

@soix

Buy yourself the Yamaha AS2000 I listed earlier.  If it doesn't smoke the 5000 you have, just return it.  But, give both at least 100 hours of burn-in time...

I don't have any complaints with the Yamaha P5000S. I don't know if it will be the amp that suits all my music listening needs for the future, but for now, it's doing a good job. I think it was a good recommendation and I'm happy with it.

The Yamaha AS2000 costs 3 times as much. I'm not sure it would give me a 3x better experience. And with a 30 day return policy, it would be hard to give it a 100 hr break-in and stay within that return window.

Furthermore, my objective is not to buy anything and everything with the idea in mind that I can return it. I would prefer to buy stuff that I believe I'll end up keeping. Returns are a fall-back option only.

Anyway, my intent in this question was to select speakers that will work with my current Yamaha P5000S amp, and I'm still proceeding with that intention. I have a good list of speaker candidates.

If you can take the Yamaha anywhere to try out with different speakers and compare with an amp that is not made for a nightclub you may find that it will not make anything sound good. In other words whatever Speaker you get don’t base the sound off what you are hearing with a cheap class d amp. 

@mofojo I'm not entirely sure what you were trying to say. However, here is my actual experience with this Yamaha P5000S amp.

First, the problem that originally brought me here, harsh and fatiguing higher frequencies, was mostly cured by switching to this amp. It was the single biggest improvement I made. Changing speakers further improved that issue to the point where it is no longer a problem.

I'm not suggesting there is no room for further improvement -- indeed I am planning to purchase both a pair of floorstanding speakers and a new subwoofer. However, I came here a couple weeks ago with a problem. My music was hurting my ears! With the Yamaha amp, I do not currently have that problem. I'm enjoying my system now.

Furthermore, when I listen to music now, I have a sense of an expansive sound stage, I can easily make out each instrument, I can hear an impressive level of detail. I can turn the volume up and make it loud, and the quality does not degrade. Cymbals sound good, female voices sound good, bass guitars sound good, etc. My most challenging music, classical Indian music (such as sitar with a "drone" accompaniment instrument called a tanpura) sounds enjoyable. (It's not as good a a live concert, but I don't think I'll get close to "live" until I can purchase some really high end speakers, a new subwoofer and optimize my listening room. Switching amps right now is not going to get me to "like live music", as I am sure everyone here will agree.)

I am coming to realize that the biggest deficiency in my system is probably the subwoofer, which is too boomy.

With the range, dynamism, clarity and detail I hear, as well as lack of noise, I don't really see a need to spend energy trying to solve a problem that doesn't exist. People here are quick to assume my Yamaha amp is  a problem simply because of the "club" tag it carries.

@kalali said, "...polluting this site by providing misinformation based on the absence of actual experience."

I have no idea exactly what or who kalali was referring to, and I absolutely don't care because I have no interest in who said what. In spite of the harsh language, there is a point there. I do observe that there have been an overwhelming number of negative comments about this amp from people who have no actual experience with it. Do those comments "pollute" this site? I'll stay out of that debate.

In terms of my next steps, I am certainly not going to switch amps before I buy new speakers. Some of you can deride the Yamaha amp as much as you wish, but I am thoroughly enjoying it. New speakers are my next step.

I'm out.  Glad you're happy with your amp and best of luck finding speakers that work for you.  Enjoy the music!