Quoting:
I bought new Quad ESL's 15 years ago - and I'm keeping them. The 29 series is very smooth and elegant, and build quality is high. The 28 series is brighter, too bright for my taste. YMMV
I quoted ithe 2nd recommendation for Quad ESL-63 electrostatic speakers, and I will be the third. I imported a pair of Quads from England in 1985. I had them rebuilt about 4 years ago which was much needed and a splendid improvement in sound quality. They are absolutely special speakers, the sort of speakers you want to be buried with, they’re that good. Their only weakness is they cannot do justice to bass dominant music. They are ideal for classical and opera, folk and country., piano and violin, guitar, vocals. You can often find a used pair on eBay and have them rebuilt for far less than one pays for many ordinary speakers.