I recently setup my old pair of M50s in my parents house and they were blown away. Actually, I was too a little. They have a semi-perfect listening environment, at least much better than mine. It's funny, this whole time I had one of the best speakers from Axiom and didn't know it, imho. Full disclaimer i've heard the M5HP on walls, not the bookshelves and I'm now using the M100s. The 100's sound amazing, especially at higher levels.

Lots of speakers from many
manufactures...mostly Axiom