I found my Maggies are not bad when it comes to placement. Yes, you need some space from the front wall but you can keep the speaker close to the side walls since the first reflections are not as bad as cone speakers. My understanding is that they are also OK with shorter ceilings, though I could not test that.
My Mini sounds better (smother, more detailed, and not as bright) compared to the LRS+. Magnepan says that the Mini is a shrunken 3.7.
I sold my Sanders Magtech amp to TMRAudio and bought the Schitt Wotan amp to drive the Mini. The Sanders is a great amp for Maggies. I needed an amp that I could put on STANDBY manually not automatically like the Magtech.
I am using a CODA #16 amp at the moment while I wait for the Wotan. The Mini really scales with quality amplification and DAC. This is the best I have heard the LRS+ or the MIni.
BTW - I am planning on getting an Open Baffle later this year. I posted some info on the Open Baffle thread.