Would the Elac Debuts be in your budget?
I managed to pick up some open box debut reference 6.2 for £400, they are incredible little boxes, I'd image in the Debut 6.2 would be similarly impressive and cheaper.
Interesting thread otherwise, shame you didn't get the hear any of the Denon amps, as I've got one and thinking of upgrading to something with more power and connections, the PM7000N is on my list.
Got a good review from Darko
Proof that an abundance of features doesn't have to cost the earth.
darko.audio
Sounds similar to the Denon range (not surprising really). Heos is the issue for me, I'd have to continue to use my Connect streamer to stream via Roon, and/or change sub from qobuz to Tidal.