Proac response D2 or Harbeth for a Leben cs-600

Concur with Charles1dad.

To the OP, if you prefer your sound on the heavier, bassier side of things then Harbeth's are less likely to deliver.

Devore speakers have been suggested in the past as a musical match ... maybe worth considering also.

I use to own the Leben CS600 and Harbeth SHL5. Although pleasant sounding, I wasn't overally impressed with the synergy, even after changing to Sovtek EL34 or Harma 5881 tubes. For my taste I found the Harbeth's sounded better with my Audiosector Patek SE (40w/ch gainclone) amp. Using the more precise and neutral sounding Patek, with DNM reson IC and speaker cables, the SHL5 sang with greater cohesion with a tighter, punchier mid bass and neutral mid range. I also found the SHL5 responded very well with proper speaker stands and care with positioning.

Thanks to all of you, for your comments on this topic.
The reason for me to buy the amp before the speakers, was that I suddently had a great offer to buy a used cs-600 right in my neighbourhood.
At the moment I have a pair of Evox made on the Dali factory in denmark.
it is a very good speaker for its price tag. But now I want something else.
I think I will try with proacs, I am having a demo next week. And hopefully I will borrow them home with me, and try them out here.

May want to audition Verity Finns or Zu Souls. These pair exceptionally well.