which excels at Rock and Roll

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 

I had a pair of DeVore Gibbon 8 speakers.  They are definitely NOT for Rock.  Jazz and classical they excel, rock NOT.  I drove from RI to Annapolis Maryland and back in one day to pick them up a couple of days before New Years in 2008 or 2009, my memory isn’t that clear.  Hooked them up the next morning as I got home after midnight and what a huge disappointment.  I really wanted to like them, added a sub but they were just too soft for Rock.  I kept them for a little over a year but ended selling them for what I paid.  They were gorgeous speakers but didn’t play Pink Floyd well at all.  One of my systems is strictly for Rock and I use the JBL L100 Classic speakers and a single SVS subwoofer.  I drive them with a 200wpc McIntosh integrated amp.  Match made in Heaven.

Those Acora MRBs have sounded sensational at shows.

I didn’t read all the comments but if you want a REALLY good rock that’s also a really good speaker in general, check out the Volti Rivals. I owned & enjoyed some good Dynaudios & have heard many of the other suggestions mentioned many of which are quite good in different ways but none can do rock like those Voltis. Additionally, you only need a good 20-30 watts to make them sing at almost any volume in a big room. They truly sound like live music & not hyper detailed hifi. 

Next thing you know,..he might claim his 'genre agnostic' tube amps might just work great for every kind of speaker I have and my entire music collection spanning every genre available.

The ASR guys and their 10 dollar chip amps with off the charts sinad might do it too.

I should only buy the asr chinese chip amps and atmasphere tubes. It's all I ever needed apparently!

Ralph Karsten (atmasphere) always makes his above argument. And while in theory it may be correct, in practice it is not. Just one example: If you want to play AC/DC or The Ramones at 100dB, the QUAD ESL is a bad choice; a pair of them is not going to last very long if you do.