I don't think I've ever heard a loudspeaker that I've been completely happy with.
Quad ESLs have that "open window" thing, but are limited for dynamics and bandwidth. Stax F81 make Quads seem cloudy, but are monstrously inefficient, undynamic, and "small" sounding. The old original Martin Logan CLS were also clearer than Quads but could be a bit fatiguing and relentless, and really had no bass. JBL, Klipsch and Altec can do dynamics in spades, at the expense of any sort of timbre. Revel and Magico appear to try to "do it all" but sound artificial and it just "smacks of effort". Wilsons all have the smiley-face EQ that sounds impressive on Audiophile Recordings. BBC-influenced designs are easy to listen to, kind of like Quads without that last level of detail, will go louder and deeper than Quads but not enough, and are still dynamically stunted. But that's what I use as my present compromise that I can live with.
Is it really too much to ask for a speaker to be able to get up and go like Altecs, but be full range, have natural timbre, be insightful and do a believable image/soundstage?