I do not know those speakers but folks seem to say they are good. That leaves the source and the integrated. I have the Bluesound and it is very good for the money. So that leaves the amp.
By all accounts Hegel has gorgeous sounding amps but they can be pricey. Used can be a crap shoot. I would get something nice like a NAD C368 which works seemlessly either the Bluesound Node. Your total spend would be $1K and transformative. The little integrated would be light years better than the AVR. I went on this same journey last year. You can also try a Cambridge or an Arcam some such. If you buy from an online retailer they will give you a nice in home trial period. Easy Peasy.
Another alternative is to try a PS Audio Sprout. Supposed to be a perfect little amp for your exact situation
finakky, don’t forget speaker placement