I am about to embark on my next upgrade journey

Since you are asking about speakers, I also recommend Fritz Carbon 7SE MK2s. They fit your desired specifications. A very easy to drive and like speaker. I own a pair and use them in at room much like yours. John, the owner of Fritz,  offers 30 day home trials. I encourage you to give him a call. Very nice Web site also.

I also agree that you could make advances with the improvement of your source. A subject for a different thread possibly.

Good luck in your search.

I’ve owned many speakers over the years mostly British made as I prefer their sound characteristics. Recently purchased Harbeth C7es-XD pair. If you want something that sounds like real music with no hype then  Harbeth is a wonderful brand with several models. They all sound musical. 

I own a set of Fritz carbon 7se  MK2 in a smaller listening room with very good electronics (IMO) and a SVS SB 3000 sub. Listen to only Rock, they are so GOOD. I told Fritz during a recent conversation, after listening  for 3 plus hours that I would never sell them. They look so simple and refined, but sound so good. The call was just about telling him How much I enjoyed them. Robert TN

Room correction. I recently added a McIntosh Men220 room correction unit to my system. It dramatically changed the sound for the better. I may do a full on report if anyone is interested. But, one of the big things it did was to align all of the phase and frequencies between my speakers and subwoofers. It adjusted phase and crossover frequencies, making all of my speakers work together. It was also a hit in the WAF, (wife appreciation factor) as my wife can decorate without multiple room acoustic treatments all over the room. 

I would definitely recommend auditioning the Borresen X-Series the X1 starts at $5,500 US and even the X2 is only $8,800 and the X3 is $11,000 and they punch way above their price range phenomenal sounding speakers.