I have the Rockport Cygnus, but I also have acute FOMO. I read about all the new speakers and I get worked up. Then I listen to my system and it sounds phenomenal when fed via my curated signal path. The Rockport's are not a flashy speaker except that their speaker cabinet design is copied by many. They don't fatigue your brain/ears. At less than 40K used and at 300 pounds they are a tremendous value in my opinion. The real point I want to make is that the Cygnus continues to resolve at greater and greater levels as I improve the signal I feed it. I have not hit it's resolution limit yet, so to me it still has more potential. Last month I added custom made Townshend Podiums and removed the solid footers. They tightened the image and focused the instruments, plus they make the Rockport's look like a modern speaker design. I believe many of these points are valid as you move up and down the Rockport line.
Please don't take this next point as me talking down to anyone, but I want to add a side point that those of you who try new technologies like the Altaira grounding system, component isolation, power conditioning etc and can't hear their contributions, I suggest that you have exceeded your systems' ability to resolve. You have some weak link that isn't capable of allowing those fine details through. The Parasound JC1+ is an example I have owned that hits a limit on resolution. The amp does almost nothing wrong tonally and has tons of power and driver grip, but it doesn't allow the resolution of fine acoustic details to be heard.
Good luck with your search, you have a good budget for a truly great system. After you pick your new speakers make sure the amp compliments the speaker, that your placement is super finetuned, they are isolated from vibrations and have complimentary cables. I used to stretch financially to buy a speaker, hook it up and wonder why it wasn't spectacular. You need to tune it to your room and other equipment.