However, as I always end my posts, it depends upon YOUR ROOM, which everyone knows is the most important variable in any system.
SO, bring them home and listen and see what YOU think. Personally, they were a revelation to me when I first heard them in my shop in 1973.
We had at least 40 different brands and many models of each brand in the shop and I had to listen to ALL of them to be able to sell them. Except for Fulton 80 and 100 box speakers (not available for many years now except used on ebay, etc.) there were NO boxes that were even in the same universe as Maggies.
Today, designers have MANY 6" tall speakers--wonder where they got THAT idea???--and boxes have come a long way, so I am no longer qualified to judge. Having typed that, I can tell you that Maggies STILL add nothing to the sound of your gear, so set up what you have/wish to buy IN YOUR ROOM and make your own decision.
As for placement, YES, very critical, which is why you need a good dealer who understands room acoustical properties to help you with this. Also, if you prefer the chest-thumping bass from rock songs or classical orchestras recorded properly, you can always add some subwoofers if that is what you like.
Maggies are the best, as I always post, but you have to like them in your room first. Enjoy the music...
Cheers!