Different amplifier class for different music genres?

@czarivey 
Nice to hear from you.

To see how different settings on amps influence sound, read my review of the Gold Note PA-1175 at Dagogo.com

To see how class D is usurping the other classes of amps, classes A, A/B and tube amps - in fact, already has with some brands/models of class D - read my review of the Legacy Audio i.V4 Ultra Amplifier at the same site. 

Seeking any equipment for purported superior performance with any particular genre of music is a great way to build a mediocre rig. I suggest the OP search for an amp that will drive any genre of speakers in a superior fashion, as this will more likely ensure superior performance. As explicated in the review.   :) 

For example for metal is important to have fast transients, leading edges of electronic instruments to be well reproduced, as well as fast paced and deep bass, while for classical reproduction of the accuracy of the acoustic instruments and super low noise are one the important factors.

Nonsense. The transient on a bass drum, rim shot or cymbal crash is the same in any musical genre.

A system that can make you hold onto your hat in "Another Brick in the Wall" will make you jump behind the divan for 1812 cannon.

A system without super low noise will degrade ALL genre. There must be ZERO HUM and only the slightest thermal rush with an ear on the grill. If you can hear ANY NOISE AT ALL more than a foot from the driver, IT IS WAY TOO MUCH!!!

Most home users would be astounded at how poorly their systems perform compared to good recording studio monitors, typically tri-amped and often with a KW+ per channel. Systems so quiet that you will jump when the music starts!

Here we have Class D subs and woofers, tube mids and tweets for a pikers 615WPC.

"Joe Pass is sitting right THERE!"

So the question is: does the class of the amplifier matter or better suit the type of music you are listening to?

Not at all. The quality of reproduction is what matters and that has a lot to do with execution. No-one has yet sorted out a way to make any kind of audio circuit that favors one genre of music over another; anything you may have heard to the contrary is myth, maybe the most common myth in audio.

NO, a good amplifier will play all music well. My favorite amps are Class A, but run warmer and use more power than Class AB or Class D. In my opinion, Class D sound a bit harsh.