I can add that I have my M80s hooked up to Emotiva UPA-1 monoblocks (I also own an XPA-5) and I am very happy with the results. I have and use a multitude of sources (vinyl, PC Hi-Rez, CD, SACD, BluRay Audio even a tape deck LOL) for both music and movies with very pleasant (for my ears) sound.

M80 v3, 2 x Emotiva UPA-1 Monoblocks, XPA-5, UMC-1 PrePro
Pro-Ject RPM Genie, Carver C2 Phono Preamp