Experienced Maggie Lovers Please Advise

I have the 37i and have also owned 1.7 and 1.7i as well as a friend bringing LRS over and as other have said bigger is definitely better, you get a better sound stage, more definition and cleaner sounding instruments and vocals . If you enjoy rock and music with deep bass a sub is a welcome addition.

I have always purchased gently used to get more for the dollar.

Agree that bigger is better, as long as your room is big enough...otherwise smaller can be better...LRS+ in a small room is awesome...agree that the 1.7i might be the best value...

I have what many would consider a small room 12 X 15 with my 3.7i and two subs and I'm glad I upgraded to the largest Maggie's I could afford.

I have a small acoustically treated room, 12x11x9 that I had a few speakers in, from monitors to a full-range speaker. I always needed the acoustic treatments with all the speakers including the LRS+. However, with the LRS+ I found that removing the absorption panels for the left and right first reflections improved the sound of the LRS+, without any negative issues.

My only complaint on the LRS+ is that it is not as detailed as some other speakers I have had in the same space with the same price point, ex KEF LS50 Meta. However, the LRS+ was better overall for what I like, a big soundstage with depth that I could overlook the less than great detail retrieval,

A new speaker from Magnepan seems to address my concerns.

MAGNEPAN .7X, Compared with LRS+ and More! (youtube.com)

The other thing to consider with maggies is the power. They love power and the bigger you go the more power they can take. You don't mention what amplification you have or are considering but, in my opinion, the 3.7's I've dealt with sounded much better on a good 200wpc amp than a 100wpc amp. I suspect the 2.7 would also be in this category. 

With that said, I'm sure others would agree, if you go down to the 1.7 or below a good 100wpc amp will do fine.