@alphonsodamato : High efficiency makers (>95 db) - wide range of prices. All made in North America or have dealers in North America (one or two exceptions)
Would also focus on impedance - with these sort of speakers should be able to have 8 or 6 ohms. Would not buy a 4 ohm speaker
At 90 - 95db sensitivity, there are additional brands not mentioned below (which your amp would easily drive, if the speaker is 8 or 6 ohms)
Caintuck (open baffle, mostly)
Classic Audio
Coherent Audio
Creation Audio (Australia, however)
Cube Audio
Daedalus
Fern & Roby
Fleetwood Sound ($)
Goodwin Speakers
Lii Audio
NSMT
Ocellia (France, $)
Omega Speakers (mentioned above)
Pure Audio Project (open baffle)
Spatial (open baffle)
Zu
(The Salks and Ascends mentioned above seem to be of pretty ordinary efficiency, unless I am missing something. Left out Klipsch because of large footprint. I may have left out something mentioned above it’s by accident)
Fun question - let us know as you start to narrow things down, would be great to hear your thinking!
Have a great day