Funny that you would mention Harbeth P3's, because they were what I ended up choosing. I listen mostly to classical music, and Harbeth is excellent at realistic reproduction of unamplified acoustic instruments and voice.
I listen 4 feet away from speakers on my nearfield desktop system. With the Suns, I wanted to turn the volume up for better sound and listen from farther away. I loved the tiny size and clean design and really wanted it to work, but at close range it was louder than I want for music listening. The P3 does well playing low volume at close range.