which excels at Rock and Roll

@ghdprentice I agree. Electronic / prog. music has huge soundstage, very airy and ,yes, dynamics with my planars and Rythmik sub. Example, I dont know how Radiohead engineers their recordings, but it makes my systems adrenalin kick in.

Certain jazz and most softer female voices sound wonderful too.

Hard rock, piercing guitars not so much. My past Kilpsch towers with horns seemed to handle rock better, but horns tended to fatigue.

I have to disagree that components equally reproduce music of all genre. That is the ideal, but in reality it is not true.

Let us consider this track by thin lizzy (one of my test tracks) with Brian Downey on drums doing his thing back during his younger days. Play this track at 100db+ and you couldn’t for the life of me (or for another 50 lifetimes) tell me these 2 speakers are genre agnostic and will fulfill this track the same way.

@ghdprentice @deep_333 The issue you are dealing with is that of a limited sample size. Rock covers quite a range and for every recording that seems best reproduced by a certain speaker I can find one that flies in the face of it. Classical is every bit as demanding as rock (with similar sound pressures); rock requires every bit the resolution as required by classical or jazz or folk or electronia. 

The logical fallacy known as a limited sample size is causing your conclusions to be false. Its a very common conclusion! But if you have a decent speaker (IOW, deep_333, the recording you chose is showing up one speaker more than the other) then all genres will play equally well. If the speaker is lacking, all genres will play equally lacking, although as you have found, some recordings will come through better or suffer more according to that lack. But it will not be universal across the genre! 

I saw one person asking (seriously) what speaker favored downbeat 80s new wave once... Sheesh!

If one is looking for the recording to sound the way the audio engineer intended, find the largest, most neutral speakers that don't overwhelm your listening space and supply them with the maximum power allowed. If you are looking for more punch, do as the professionals do and add a Behringer SX3040 sound exciter.

I've heard the Marten Oscar Duos and definitely preferred them to my Fritz, which I loved, and then auditioned the Parker Duos and the mids on those were amazing, so that's what I went with. 

As for agnostic speakers, I've had a number of different speakers in my system, including Harbeth Super HL7's, and while great sounding for many smoother genres, those Harbeths are not designed with rock music or reggae in mind. 

I have a MA7900 McIntosh int amp @200 wpc and a pair of reformed JBL L100 T's reconditioned , refoamed and Crossover Chef crossover's with a room your size. With a good high end SACD player like my Denon DCD-A110 classic rock will transports me into the next dimension