So I just bought a Hegel H390 and

Just buy these https://www.usaudiomart.com/details/649764283-salk-song3-speakers/

i demo’d speakers going up to $6k and preferred the Salks. I’ve upgraded to Cube Nenuphar Mini’s and at 1/3 the price (when new) the Salks more than held their own. I’ve had some people listen to both who actually prefer the Salks and I can see why because they dig deeper and the RAAL tweeter is amazing. Fantastic match with you beautiful Hegel. 

I owned the h390 and had it paired with the Triton Reference speakers.  Was very pleased with the sound.  I found the Triton to be an excellent value. The company motto is "We make High End Affordable".  I think they retail in the $7000 range in the U.S.  Encourage you to check them out before you make the final decision.  Also, don't rule out buying used.  There's a lot of terrific bargains out there.  Got to love "like new" at half the price?  

I recently demoed a pair of Fink Team KIMs. I highly recommend you see if you can demo them as well. They use an AMT tweeter that creates an incredibly atmospheric soundstage. The KIMs completely disappeared into the background. They have low impedance but the Hegal should have no trouble driving them. I wish I knew about them when I was shopping for speakers in this price range a year ago.

Depending on your room and musical tastes, consider auditioning Maggies — .7i or 1.7i

The Hegel is a solid meaty sounding unit. Among many stand out speakers, consider a look a the new Audio Physic Tempo 35.  It is quality through and through, well balanced, and transparent in a rewardingly musical way.