I am using regularly RA 234 speakers in 5.1 configuration (with EAW surrounds and McCauley subwoofer) and I have specified the same system (except this time with JBL 8340A surrounds) for my new studio.
These monitors are extremely detailed and reveal a lot in the midrange. The crossover they specify for the system is asymmetric, LP is 24 dB/oct and HP is 12 dB/oct.
Speakers can reproduce 20 Hz effortlessly, and HF driver, as you said, is one of the best around (also used by Kino****a). Amps are asymmetric, too, HF section is powered by 50W class A, while LF has 400W, AB.
They're not "nice sounding" monitors, and you have to put a lot of effort into your mix to get it sound right. Errors in recordings are easily audible.
If you go for a McCauley sub, you'll be hearing 16 Hz in your studio without any distortion.