Here ya go! Listen to these - you will be amazed!
https://www.youtube.com/watch?v=2E8ExBUC64c
I have both the 30.2's and the 40.3's - both of which sound very much like the Quad ESL 57's - which is one of the best sounding speakers at any price.
Though... these all excel with jazz, classical, blues, country - and all things acoustic! You may prefer alternative speakers for rock, or similar sounds.
If you're into those types of music... you will have difficulty trying to best Harbeths.
But... they must be driven with great, powerful, SS electronics - such as those Harbeth demos their speakers with at shows (Hegel amps). I drive mine with the Hegal H590 - which produces their best sound. Harbeths are not at their best with lesser electronics.
With the right electronics they have a warm, rich, full sound with great clarity, which is not hard and strident. A sax, or cello, or upright bass - sound live - like they're in the room with you.
Listen to the above demo (and similar demos on YouTube), and you'll get a good idea of how live they sound. And... if you want greater treble and dynamic emphasis - the SHL5 XD will provide that, while still providing the rich, warm, full sound.