The midi range, not the tweeter, is the most important driver in a speaker.

Yes the Scan Rev looks likeav  awesome bass response,,But I am not into heavy bass. 
I need midarnge as all my muisc is classical, no bass guitar, no heavy drums. 
= as per OP, Midrange is the most important fq's in any speaker. 
SEAS wins out big time. 
sure the SEAS are 2x's the price of Sacn.s , but if we are going to buy $$$$$$$$$$ amps, why not speand a  few extra bucks and get the most critical compoenet of our systems. 
I've heard $100K Jadis systems on a  YT vid at a  LV show,, sounded like crap, ,,why?
Speakers were 100% crapo. 
Go figure.  
I hope folks realize, big is not always better. Some folks tend to think wow, look at the huge speakers here,,,they MUST BE GREAT SOUNDING,,,haha, Graets ound can come froma  2 way and bow out speakers with 20 drivers. 
I've heard this way back in 1974, The big Macintosh had 25 drivers in each cabinet,,,The interphase A1's  witha  passive radiator woofer +  woofer, anda  tweet<<<< blew the $$$$$$$$$ Macintosh out the water>>>
Go figure. . 

I never said the Scanspeaks lacked in midrange. They are wonderful. I only meant to say they also had big deep bass in the right cabinet. Never said they were chest thumpers either.


The integration of a speaker with the room is so critically important and why a good 2-way can outperform a lot of other speakers. Smaller = less problems in the lower octaves.


But ... speakers with built in room correction in the lower octave can perform even better. :)

Yes and no for my speakers. The mid driver, 8” Seas Excel, covers 4 octaves, the tweeters, Seas Millenium, covers 4 octaves. I can’t hear the last one🤭.

Woofers have the first 2 octaves. Crossover at 92hz, and 1440hz. Crossover causes NO issues with amplifiers. Active crossover is between preamp and amps. Amplifier load is just the driver. 
To make K....t happy, no backwave to contain. Open baffles. Bass cancellation? No. Flat to about 24 in my room. Great energy in the all important power range. 
I built these in 2006. Designed in 2004 by the brilliant Seigfried Linkwitz. Orion 3.4. 
No mdf. Hardwood and Appleply. 
Check Out https://www.linkwitzlab.com/  For a tutorial on psychoacoustics, room interface and more. 
No room treatments needed with proper sound dispersion. 
Mic drop.

J. Gordon Holt said it first and best:

"If the midrange isn't right then nothing else matters."

You tell 'em Gordo.  RIP.