I bought the LRS (not +) a few years ago. I drove it with an old HK Citation 12 and 11 and it sounded very nice. The LRS is a gateway drug and it was for me. I had more room to move the speakers out into the room and I found myself wanting more bass and oomph so I sold them and bought some used .7s which sounded similar to me but better.
I don't know how the Magnepans will sound with Class D but my one experience with a Class D amp was that it worked with some speakers but not others.
I ultimately sold the .7s and went to open baffle speakers because I wanted the open sound plus dynamics and I've stayed thereafter with the speakers I bought.