Accurate human voice reproduction

Rather than an indictment of Harbeth, it may be an indictment of playing NPR through your main system. I never do, so can't say. NPR sets the standard for human voice from the radio, but I expect they have it tuned for table radios, car stereo and the like, rather than playback through full-range systems.

dc10audio Berlin has best female vocals I've heard and Leonard Cohen is spooky real.

My guess is paper cone drivers do a much better job than all the ceramic, plastic, and aluminum speaker cones out there I think Vanderseen has a balsa wood pulp cone my guess is that would be fantastic too.

Also the Harbeth P3ESR...

SHL5 is a very interesting speaker. In my room they are the most dynamic speakers I have heard. With music, they are able to pressurize my room giving me the "wall of sound." However, if I am watching a movie, I don't want to be pressurized by dialogue so I prefer other speakers for speech.

All speakers are different. That's want makes this hobby great.