Harbeths excel with Hegel amps 30.1 / 30.2 / SHL5 all are unmatched for jazz, classical, blues, country - all things acoustic and vocals. And though they really don’t need subs - your RELS mate well. You will be amazed!
I’ve got the 30.1 and 40.2 - and they sound as good as my Maggies and Linkwitz Orions.