high-efficiency loudspeakers

I am a fan of many high-efficiency systems, but, most are systems built from high efficiency drivers and custom cabinets and crossovers and not complete packages.  I like some vintage drivers and a few modern drivers that are either straight out replicas of old drivers or are modern updates of old drivers; these however, are crazy expensive (e.g., G.I.P, Cogent, Goto).  

Of the modern, complete systems, my favorite are the Charney Audio systems utilizing full range drivers in back-loaded horn configurations.  Until I heard the Charneys, I did not think that a single driver system could really be a complete speaker capable of playing all sorts of music very well.

For a fairly low-cost high efficiency system (albeit with a built-in amplifier for its bass driver), I like the Rethm Bhaava.  At a substantially higher price level, I like the Avantgarde systems that also use powered bass drivers.

For not so high efficiency speakers, I like the entire line of Audio Note speakers, The 093 family of Devores, Trenner and Friedl speakers, Classic Audio field coil driver speakers and Horning.

I know they aren't the "best", but I really enjoy my Legacy Audio Focus 20/20 speakers. I've heard better speakers, but purchasing a used set of these was the best price / performance compromise for me. I also have a pair of Klipsch klf-30 speakers and a pair of Klipsch heresy I. I've gone through and replaced the crossovers and all of the drivers in the heresy and the crossovers mids and tweets in the klf-30s with parts from Bob Crites.  They are both very listenable speakers.

By the way, tseamless isn't an actual word.

Since I last posted, I can add the Cube Audio Nenuphar Basis (Nenuphar full range driver supplemented by a powered woofer).  To me, this system is MUCH better than the single driver Nenuphar system and at a not ultra crazy price.  In the really high end range, I heard a recent custom build by Deja Vu Audio that sounds great--vintage Western Electric 713A driver and 32 horn for midrange, Fostex tweeter (current model), and vintage Goodman 18" woofer, modern parts crossover using Audio Note copper capacitors).  This system sounds terrific when driven by Western Electric 124 amps (6L6 or 350B tubes).