I am a proud Guarneri owner myself...sorry never heard the Harbeth. All I can add is that it would be hard to imagine a speaker sounding finer on the types of music you mentioned.
SF Guarneri Homage vs Harbeth 7ES3
I am considering either one of these two speakers. A used Guarneri does not cost much more than a new Harbeth 7ES3. I listen to a lot of Jazz, vocal, strings, country. All of my electronics is EAR (except for a Shindo preamp). Any recommendations from people who've tried both? Thanks.