I hate threads like this because the Maggie's are the only speakers I keep thinking I should go back to. Let me explain.
My first real speakers were original Large Advents; I still own two pairs. About 15 years ago we moved into a new home with a great man cave basement with two large windows. Does not feel like a basement at all. 35 feet long by 18 wide with 9 foot ceilings. Due to a support beam in middle of the room, I am restricted to a space about 16 feet long from the front wall.
Anyway, I was looking for box speakers and heard Magnepan 1.2's. They sounded like Advents to me only much better. Bought them on the spot. I moved up to 1.7's but did not really enjoy them as much. Moved up to 3.6's. Loved them with a Wyred4Sound ST1000 at 500 WPC (back then, I understood power but not quality). Certainly played loud but I kept hearing about Thiel speakers being Magnepans on steroids.
Anyway, moved to Thiel CS3.6's and got lucky to find a pair of CS5i's. All that time, I still had the Maggie 3.6's. Finally found an amp I liked with the CS5i's - McCormack DNA500. At that point, I was selling the Maggie 3.6's and listened to them one last time with the DNA 500. Wow! Wonderful bass! So I agree that one needs a quality amp with Maggie's. The bass with a good amp is nuanced and you can feel it.
Then I kind of got tired with the Thiels; just could not make then disappear and felt they were a bit too polite. So now I am going down the efficient speakers and low power amp rathole. Zu Soul Sixes and Klipsch Forte iv's.
While auditioning Fortes and Cornwalls, I was also able to hear Maggie 1.7i's and 3.7i's. Still sounded good to me. Then this thread, and I am thinking maybe I should just forgot the Zu and Klipsch and get back to Maggies. They are really good speakers!
Thanks for listening!