Well, I left them playing overnight just to kick a little of the new dust off the drivers. I put on a favorite Sunday morning recording of mine and it just sounds divine. I've probably said 100 times here that I'd never sell my hd650. It is after all the ONE thing I've bought and never sold. I may have to eat those words.
The pm-1 is better at every turn than the hd650, with the possible exception of comfort and even that is very close. I'd give the hd650 a 9.5 on comfort (hd800 gets a 10). The pm-1 gets a 9.0 on comfort due to being slightly heavier than the 650.
I'm still looking for chinks in the armor with the pm-1. So far, there really are none that I've been able to find. It plays all genres well. The tonality of the hp is voiced nearly perfectly...tone is critical for me. I play a few instruments and have been around them and heard them "live" most of my life. If the tone is off, you've lost me.
I was really worried about the lyr being too much power for the pm-1...it's not. The background is completely silent. And most importantly the "music connection factor" is very very good with these.
I do wish that the pm-1 was cheaper. Oh wait, they have a less expensive version on the way.