High Efficiency Speakers Your top 3 or more


Not taking cost or musical preferences into account what are the top 3 high efficiency speakers you've ever heard, overall?
mmike84
How highly efficient?

Is 89-90 db enough? I think that gets you into the ballpark with most good tube amps. Or are we talking only horn loaded or similar designs much higher than that?
Let's say 92 db or higher and preferably at least 6 ohms avg. Single ended triode stuff.