Rock and roll speakers?

Note that playing anything other than Rock and Roll through speakers like these can cause permanent damage.

Efficiency might be the key since it could keep the loudness happening with less opportunity for your amp to strain. If you really want to get loud, stop messing around with hifi speakers and buy a pair (plenty of used stuff in your price range) of the largest pro PA speakers you can find along with a powered 15" or 18" sub...and prepare to be asked to move out of the neighborhood. This will allow you to have an alternate career as a DJ where you can meet hot chicks with tats and nose rings.

"Musical demands" on speakers have far more to do with output levels than styles of music, and to say that "no speaker at any price has yet to achieve perfect balance in all regards" is silly...any well designed "full range" system will play anything well, and the best play everything VERY well even at annoying levels. This is the real world...mini monitors with subs will do serious Rock and Roll and large, horn loaded, high output speakers can make softer chamber music sound amazing...I've used both types for decades and can verify this as fact. I say ignore preconceived mythology and understand that size matters (amp output, driver capability) for output level only, and recordings of even the same style can vary mightily in output...I have jazz piano trio recordings that require me to turn the sub down as the bass and kick are too hot, and electric bands that require a boost...but to think musical style will be challenging to a system based on style itself is not thinking at all.

And, seemingly, there's no point not worth missing.