Easy to drive, outstandingly natural sound from 40-50 Hz up.....AN-E, O/96, others?


If my goal were to find natural-sounding, dynamic, and efficient speakers that can be driven with a somewhat lower-powered a (i.e., 50-watt SS) amplifier, and that work well with a variety of music, would I be looking at AN-Es, O/96s, or which others?
I am not particularly interested in using a 10-20 watt SET, but being able to use something lower-powered than the 300-watt amplifiers required for my 85dB speakers would open up a lot of other amplifier options and simplify things for me.  I have two fairly high-quality powered subs so the goal would be to fill my (moderately large) room from 40-50 Hz and up and let the subs handle the lower registers.
Any thoughts on the two speakers listed, or recommendations for others?
mitch2
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I have AN-Es right now but am looking for an alternative. 
The ones I'd like to demo are:
Charney Concerto
Zu (not sure which model)
Cube Audio Nenuphar
Pure Audio Project Trio15

I'm a little hesitant about going for anything with down-firing bass woofers because I live in a condo.  If this wasn't a concern I'd be interested in:

hORNS Universum III
Tune Audio Anima
Odeon No.33
I did like the Hornings I heard at a show once but I found that the bass woofers did not integrate with the driver for the highs and mids. It could have been the room, but it sounded like two completely different speakers.