Killer Floor Standing Speakers under $4000 for Rock?

I am 95% progressive rock, prog metal, classic rock and jazz/fusion. Pretty much all vinyl too.....I have a set of Rega RX5 ($2995), 2.5 way that has a very singular sound, drivers work very well together. In metal the drums and bass guitar play such big roles in that big sound. The double kick by Mike Portnoy (Dream Theater, Transatlantic) has never sounded better and defined. And these speakers play very loud and clear....89dB and side firing woofer to help control too much bass.
These are voiced real nice for vocals and acoustic guitar which makes for excellent jazz experience.

I power these with a NAD C356BEE @ 80 wpc, very satisfying.

ZUs! The Zu Audio speakers are real party rockers. 

i do not nessesarily agree....
first we have the problem of what it was mixed and mastered to sound like....so IF the studio is using NS1000 as the be all end all monitor well...the reults are going to vary...or a big JBL with a 8" or larger paper cone mid with breakup and ringing including sigificant out of phase 2nd order distortion ( that junk also counts as output...er efficiency...but that is a shall we say dirty secret)
My theory and it is shared is the lower distortion pistonic systems are truth tellers and they lay bare the recording and a lot of rock sounds really crappy on them...
hence some of the popularity of old tube stuff with tones of  higher order distortion to add back in..

...And If the studio didn't use that particular loudspeaker? A lot don't! Some use Westlake, some JBL, some ATC, some Snell, some even Magnaplanar. IOW the monitor thing is all over the map. We use High Emotion Audio.

If you try to generalize with rock you meet a dead end. Some of it is recorded live, some in the same studio that yesterday was recording an acoustic jazz section. In fact studios have to stay in business and can't be too picky about what type of music they record!

BTW, tube electronics in general as compared to solid state tends to have **less** 'higher order distortion' (I assume you mean higher order harmonic distortion), which is why tubes tend to sound smoother.

repectfully. disagree
monitors do matter at every step in the chain
they vary widely
a ton of classic rock was recorded and mastered with big JBL's with a host of strengths and known issues. The West coast sound is not a myth.

(2) ways to go about your query OP-

you can go w/ an older "rock" speaker- Infinity Cresendo Series (1990's)
or go w/ a Thiel CS 2.4 or CS 2.7 loudspeaker.  Happy Listening!