It's a matter of picking which poison you can live with.
What Harbeth does well- a fatigue free sound with very good detail, vocal timbre and tonal realism and a superb midrange- I have not heard another speaker that sound better in those areas.
What they do not do exceptionally well is bass articulation, speed and dynamics. If Harbeth made a higher sensitivity floor standing speaker I would be all over it.
My last Harbeth (SHL5+) required subwoofer support for world class bass but with an open port and lossy cabinet perfect integration was not achievable.
My current Spendor D series floorstander gives you the dynamics, bass and articulation without losing too much in the midrange.