I recently heard the Naia's and Celius's side by side through a couple different tube amps. Rouge, Unico. The Naia's sounded better all around and look more refined and finished. What you'd expect from a $3,000 speaker. Make no mistake the Celius's sounded sweet, as their grill covers sagged like an old pair of wornout nylons. Does the sound and aesthetic really justify a $1,000 difference? After 2 years I'd probably say yes.