Thanks a lot guys!
The availability of the drivers really is an aspect I didn't have in mind.
Magical midrange - that's exactly what I'm looking for. So the magical question is which iteration to take. As far as I know the first model that had the Radial midrange driver was the HL7 compact. Which means the earlier HL compact didn't have it. I wrote an email directly to harbeth and they promised to get back in time. @dodgealum absolutely sure it you owned the HL compact? Their front was all black while the later HL 7' s corpus including the front was brown.