I'm running a Denon AVR X-4000 with Onkyo THX-certified theater reference surround speakers... yeah that sounds good till you realize it's HTiB speakers (I think they are https://www.onkyousa.com/product/sks-ht993thx/) which has been ok but it's time to grow up. Someone said Elac, everyone...
I have a 3-4 year old Denon AVR-X4000 that was great when I bought it but have had some issues over the years. And my speakers have got quieter and quieter over time (yeah I'm getting older so maybe it's my ears :) )
I've finally upgraded to a 4K TV and hope to soon buy the new...