Opinions and recommendations on active loudspeakers

The crossovers and every wire in your speakers already "vibrate like hell" as does the amp and everything else in a powered subwoofer or speaker...however, no problemo, and powered speakers like ATCs and others (and every powered PA box hung over yer head at live events) have garnered praise from plenty with well tuned earballs. Kinda makes the Anti Vibration Industry look silly, don't it?. I've owned tube combo guitar amps (meaning the fragile little snowflake of a tube amp is in the box with the speaker...horrors!) that were unmodified from 75 years ago that sound sublime, and my 2 el cheapo used RELs also have been doing their job well for years in spite of a hellish nightmare of self induced vibration. 

If you want ATCs and are worried about built-in amps you can just order them with the remote amplifier option.  They also sell passive speakers and stand-alone amps, and some active models that come with remote amps standard.  

http://atcloudspeakers.co.uk/wp-content/uploads/2017/12/ATC-Tech-Note-Remote-Amp-Mounting_revA.pdf

I have a decent size room so bought a pair of used dsp8000's. I heard the Kii3 at axpona and liked the modular idea. The Kef ls50 has an active version now that's supposed to sound even better than the original. It's true you're married to the amps when you go active, but i think that's a good thing. 

Powered subwoofer is a stupid idea too, Garcia.

Another vore för Kii Three. I heard them at a show and they impressed.

You could also go worth small speakers and an integrated  class-d amp, like Boenicke W5.