My old listening room for years was 24' wide by 34' long. Vaulted ceilings.
Best listening room I've ever been in due to wall materials and some other factors. I HIGHLY recommend Magnepans for a room like the one you're describing.
They have serious potential when given the space and not crowded with other things. Other than a few plants, I had nothing else behind the speakers. My components were off to the side, which is preferable to between speakers. When I had that setup, I auditioned many expensive setups and in my head would always think(these don't come close to my system at home.) I didn't always say it because you don't want to insult someone else's setup that they're enjoying. And they were some really great rigs.
But it literally took an $85,000 rig to get into the range of realism and Natural detail that I was getting.
My point - the room is everything with Maggies and I think most people overlook this. The room I am currently in is not 30% of what I used to get in my old house.
But that is what happens when you move to the city. Unless you have a huge loft or something. Which many people do have.
Sound stage in my old room was unlike anything I'd ever heard at any price. It was not only wide, but so DEEP and holographic that it would stop you in your tracks.
Amazing. Sounded gorgeous. A friend at the time who lived around the corner still had the first pair of Magnepans ever sold. He bought them new. They sounded AMAZING. But again, large rooms, high ceilings. 12 feet, at least.
I favor this environment for Magnepans and I always suggest this to those interested in Maggies.
Regarding the sublimes, any other thoughts? Do you feel they color the sound at all? Are you satisfied with how they dial things in and tune your system? Do you feel you're at an advantage sonically? Cleaner? Less distortion? Or just different from passive, as opposed to "better."