What is your favorite High EFF speaker

Hello Everyone!

The most interesting item on my horizon lately are high efficiency speakers. 

Better said, speakers which can easily be driven by amps whose output is from 15 to 70wpc. And likely lower, ala 300B  amps, or a pr of Els or KTs, etc. there are a ton of 30 to 75wpc tube amps out there that perform at fascinating levels, and are very interesting. 

Having exactly no EXP in this realm other than a former interlude with Silverline Sonata IIIs (reputedly 93db, @ 8 ohms) some time back, I’m asking for members EXP on current or  recent production  speakers  still available you have used which check all the boxes IYO.

 imaging, resolution, bottom end accuracy, impact and honesty.

I listen to sensible  music. Nothing urban or inner city, rave, etc.., but I do enjoy twisting up the ‘fun’ knob on the preamp from time to time. 

Many thanks.