There are MANY good modern speakers that do almost everything well. I like the top end Rockport speakers, Arion Acoustic planar magnetics, Maggies of all sort, and a lot of other modern designs. But, almost all of them are dynamically a touch lifeless at low volume and do not engage my interest in the same way high efficiency systems, particularly horn systems do. Is it a fault of the speaker or the kinds of amps needed to power such speakers? The amps I really like are low power amps, particularly low power tube amps. It doesn’t really matter which is to “blame.”
There are many modern systems that are high efficiency that I do like, but they are not commonly found. I will mention a few I really like: Charney Audio Companion with AER driver (they come with several alternative); Cube Audio Nenuphar Basis (wide range driver system with a built in powered woofer); Songer Audio with field coil wide range drivers (both the single driver and two-way system); Audio Note AN-E.