I understand your desire to upgrade, that is a big part of the fun of this hobby, but I am curious as to why you are so steadfast on not replacing any other components, only the speakers. Your system should be a synergy of the individual parts.
I’d rethink as to why you want to change up what amounts to the largest and most difficult component to home audition and physically install.
Your digital sources are top class, your analog source is decent but if you do listen to a lot of vinyl, a cartridge upgrade would be relatively inexpensive, easy, and very cost effective. I did own the Hana SL for a while. Lovely for the money but there are much better choices if you go up the food chain.
Finally, regarding your amplification. I personally have never been truly happy with my system unless I am using tubes for amplification and perhaps you might want to consider that. That dimensionality you are looking for, in my experience, can best be created with tubes. You could buy 2 monoblock tubes amps for the left and right for your music listening and keep one of the Macs for you center channel when you do Video.
Should you decide to go that route, you could buy used and if not to your liking, easy to resell and ship out.
Your speakers are considered to be very good. Changing them out might provide a different sonic perspective, but perhaps a sideways move with considerable inconvenience.
Good luck and hope I didn't open up a can of worms!