I don't have M3s, I have M22s. But the sound is FANTASTIC w/ my Pro-ject Debut III turntable and my Sophia Baby amp. My preference is to have Hsu VTF2 off as well.

Very warm and detailed. My Sophia is used as a power amp BTW in this config. As blasphemous as it sounds, I even listen to MP3s this way in iTunes.