High Efficiency Speakers Your top 3 or more

Is there an generally understood start line for the handle of high efficiency in db/w?

I am seeing some speaker systems under "high sensitivity" that are not that sensitive to my understanding of it Say 93/94 db/watt. The highest I have ever seen is 118db/watt.

Has anyone mentioned Zu speakers yet? The ones I have heard have sounded good and I believe around 101 db/watt. The Essence was cheap and sounded good on Atamasphere amps.

As Mapman alluded to these can play modern music without strain too amp permitting.

If somebody can show me a SET based system that can deliver Radiohead's "In Rainbows" with the authority and rock solid iron grip in the low end that I hear currently in my system running the (not so) big Bel Canto Class Ds, in a typcial sized listening room, I will be gladly convinced.